| Base | Representation |
|---|---|
| bin | 10011010001000… |
| … | …00000111111000 |
| 3 | 102021002202101000 |
| 4 | 21220200013320 |
| 5 | 312333043110 |
| 6 | 24011525000 |
| 7 | 4001452554 |
| oct | 1150400770 |
| 9 | 367082330 |
| 10 | 161612280 |
| 11 | 83253775 |
| 12 | 46159760 |
| 13 | 2763658b |
| 14 | 1766c864 |
| 15 | e2c51c0 |
| hex | 9a201f8 |
161612280 has 128 divisors (see below), whose sum is σ = 542822400. Its totient is φ = 42768000.
The previous prime is 161612279. The next prime is 161612281. The reversal of 161612280 is 82216161.
It is an interprime number because it is at equal distance from previous prime (161612279) and next prime (161612281).
It is a super-2 number, since 2×1616122802 = 52237058093596800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (161612281) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162585 + ... + 163575.
It is an arithmetic number, because the mean of its divisors is an integer number (4240800).
Almost surely, 2161612280 is an apocalyptic number.
161612280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 161612280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271411200).
161612280 is an abundant number, since it is smaller than the sum of its proper divisors (381210120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161612280 is a wasteful number, since it uses less digits than its factorization.
161612280 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1162 (or 1152 counting only the distinct ones).
The product of its (nonzero) digits is 1152, while the sum is 27.
The square root of 161612280 is about 12712.6818571063. The cubic root of 161612280 is about 544.7009329075.
The spelling of 161612280 in words is "one hundred sixty-one million, six hundred twelve thousand, two hundred eighty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.068 sec. • engine limits •