257480847 has 24 divisors (see below), whose sum is σ = 402131184. Its totient is φ = 157814784.

The previous prime is 257480833. The next prime is 257480849. The reversal of 257480847 is 748084752.

It is not a de Polignac number, because 257480847 - 2⁸ = 257480591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257480849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25788 + ... + 34350.

It is an arithmetic number, because the mean of its divisors is an integer number (16755466).

Almost surely, 2^257480847 is an apocalyptic number.

257480847 is a deficient number, since it is larger than the sum of its proper divisors (144650337).

257480847 is a wasteful number, since it uses less digits than its factorization.

257480847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8839 (or 8836 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 45.

The square root of 257480847 is about 16046.2097393746. The cubic root of 257480847 is about 636.1823895436.

The spelling of 257480847 in words is "two hundred fifty-seven million, four hundred eighty thousand, eight hundred forty-seven".