257004156 has 24 divisors (see below), whose sum is σ = 605283840. Its totient is φ = 84866992.

The previous prime is 257004103. The next prime is 257004157. The reversal of 257004156 is 651400752.

It is a super-2 number, since 2×257004156² = 132102272402544672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257004157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98796 + ... + 101363.

It is an arithmetic number, because the mean of its divisors is an integer number (25220160).

Almost surely, 2^257004156 is an apocalyptic number.

It is an amenable number.

257004156 is an abundant number, since it is smaller than the sum of its proper divisors (348279684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257004156 is a wasteful number, since it uses less digits than its factorization.

257004156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200273 (or 200271 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 257004156 is about 16031.3491634360. The cubic root of 257004156 is about 635.7895450978.

The spelling of 257004156 in words is "two hundred fifty-seven million, four thousand, one hundred fifty-six".