257473668 has 12 divisors (see below), whose sum is σ = 600771920. Its totient is φ = 85824552.

The previous prime is 257473663. The next prime is 257473691. The reversal of 257473668 is 866374752.

257473668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (257473663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10728058 + ... + 10728081.

Almost surely, 2^257473668 is an apocalyptic number.

It is an amenable number.

257473668 is an abundant number, since it is smaller than the sum of its proper divisors (343298252).

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

257473668 is a wasteful number, since it uses less digits than its factorization.

257473668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21456146 (or 21456144 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 48.

The square root of 257473668 is about 16045.9860401285. The cubic root of 257473668 is about 636.1764768762.

The spelling of 257473668 in words is "two hundred fifty-seven million, four hundred seventy-three thousand, six hundred sixty-eight".