257697084 has 48 divisors (see below), whose sum is σ = 637949088. Its totient is φ = 80683008.

The previous prime is 257697031. The next prime is 257697091. The reversal of 257697084 is 480796752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136354 + ... + 138230.

It is an arithmetic number, because the mean of its divisors is an integer number (13290606).

Almost surely, 2^257697084 is an apocalyptic number.

It is an amenable number.

257697084 is an abundant number, since it is smaller than the sum of its proper divisors (380252004).

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

257697084 is a wasteful number, since it uses less digits than its factorization.

257697084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574 (or 2572 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 257697084 is about 16052.9462716350. The cubic root of 257697084 is about 636.3604321447.

The spelling of 257697084 in words is "two hundred fifty-seven million, six hundred ninety-seven thousand, eighty-four".