257338755 has 64 divisors (see below), whose sum is σ = 493516800. Its totient is φ = 126800640.

The previous prime is 257338747. The next prime is 257338847. The reversal of 257338755 is 557833752.

257338755 is a `hidden beast` number, since 2 + 573 + 3 + 8 + 75 + 5 = 666.

It is not a de Polignac number, because 257338755 - 2³ = 257338747 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 257338755.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103942 + ... + 106388.

It is an arithmetic number, because the mean of its divisors is an integer number (7711200).

Almost surely, 2^257338755 is an apocalyptic number.

257338755 is a deficient number, since it is larger than the sum of its proper divisors (236178045).

257338755 is a wasteful number, since it uses less digits than its factorization.

257338755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521 (or 2515 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 257338755 is about 16041.7815407142. The cubic root of 257338755 is about 636.0653412754.

It can be divided in two parts, 2573 and 38755, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 257338755 in words is "two hundred fifty-seven million, three hundred thirty-eight thousand, seven hundred fifty-five".