| Base | Representation |
|---|---|
| bin | 11101011111011… |
| … | …11010001011100 |
| 3 | 122020111222201100 |
| 4 | 32233233101130 |
| 5 | 1001313123140 |
| 6 | 40314313100 |
| 7 | 6062553306 |
| oct | 1657572134 |
| 9 | 566458640 |
| 10 | 247395420 |
| 11 | 117714928 |
| 12 | 6aa28790 |
| 13 | 3c34002c |
| 14 | 24bdc976 |
| 15 | 16abc530 |
| hex | ebef45c |
247395420 has 72 divisors (see below), whose sum is σ = 757136016. Its totient is φ = 65382912.
The previous prime is 247395413. The next prime is 247395427. The reversal of 247395420 is 24593742.
247395420 is a `hidden beast` number, since 247 + 395 + 4 + 20 = 666.
It is an interprime number because it is at equal distance from previous prime (247395413) and next prime (247395427).
It is a super-2 number, since 2×2473954202 = 122408987673952800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (247395427) 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, 14259 + ... + 26421.
It is an arithmetic number, because the mean of its divisors is an integer number (10515778).
Almost surely, 2247395420 is an apocalyptic number.
247395420 is a gapful number since it is divisible by the number (20) 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 247395420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378568008).
247395420 is an abundant number, since it is smaller than the sum of its proper divisors (509740596).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
247395420 is a wasteful number, since it uses less digits than its factorization.
247395420 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 12291 (or 12286 counting only the distinct ones).
The product of its (nonzero) digits is 60480, while the sum is 36.
The square root of 247395420 is about 15728.8086007809. The cubic root of 247395420 is about 627.7651731327.
The spelling of 247395420 in words is "two hundred forty-seven million, three hundred ninety-five thousand, four hundred twenty".
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