257440752 has 30 divisors (see below), whose sum is σ = 720476952. Its totient is φ = 85813536.

The previous prime is 257440751. The next prime is 257440793. The reversal of 257440752 is 257044752.

It is a happy number.

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 (257440751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 893748 + ... + 894035.

Almost surely, 2^257440752 is an apocalyptic number.

It is an amenable number.

257440752 is an abundant number, since it is smaller than the sum of its proper divisors (463036200).

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

257440752 is a wasteful number, since it uses less digits than its factorization.

257440752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787797 (or 1787788 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 257440752 is about 16044.9603302719. The cubic root of 257440752 is about 636.1493656542.

The spelling of 257440752 in words is "two hundred fifty-seven million, four hundred forty thousand, seven hundred fifty-two".