Base | Representation |
---|---|
bin | 1000001100111… |
… | …01010101011000 |
3 | 11210110111102210 |
4 | 10012131111120 |
5 | 120103130010 |
6 | 10454355120 |
7 | 1463543400 |
oct | 406352530 |
9 | 153414383 |
10 | 68801880 |
11 | 35922964 |
12 | 1b05baa0 |
13 | 1133c394 |
14 | 91cd800 |
15 | 6090b20 |
hex | 419d558 |
68801880 has 96 divisors (see below), whose sum is σ = 240125040. Its totient is φ = 15724800.
The previous prime is 68801867. The next prime is 68801881. The reversal of 68801880 is 8810886.
It is a happy number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (68801881) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30 + ... + 11730.
Almost surely, 268801880 is an apocalyptic number.
68801880 is a gapful number since it is divisible by the number (60) 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 68801880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120062520).
68801880 is an abundant number, since it is smaller than the sum of its proper divisors (171323160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
68801880 is a wasteful number, since it uses less digits than its factorization.
68801880 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 11729 (or 11718 counting only the distinct ones).
The product of its (nonzero) digits is 24576, while the sum is 39.
The square root of 68801880 is about 8294.6898676201. The cubic root of 68801880 is about 409.7636551790.
The spelling of 68801880 in words is "sixty-eight million, eight hundred one thousand, eight hundred eighty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.111 sec. • engine limits •