257400916 has 6 divisors (see below), whose sum is σ = 450451610. Its totient is φ = 128700456.

The previous prime is 257400901. The next prime is 257400917. The reversal of 257400916 is 619004752.

257400916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 251349316 + 6051600 = 15854^2 + 2460^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257400917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32175111 + ... + 32175118.

Almost surely, 2^257400916 is an apocalyptic number.

It is an amenable number.

257400916 is a deficient number, since it is larger than the sum of its proper divisors (193050694).

257400916 is a wasteful number, since it uses less digits than its factorization.

257400916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64350233 (or 64350231 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 257400916 is about 16043.7188955678. The cubic root of 257400916 is about 636.1165516920.

The spelling of 257400916 in words is "two hundred fifty-seven million, four hundred thousand, nine hundred sixteen".