257988734 has 32 divisors (see below), whose sum is σ = 409812480. Its totient is φ = 121669632.

The previous prime is 257988733. The next prime is 257988749. The reversal of 257988734 is 437889752.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257988733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335102 + ... + 335870.

It is an arithmetic number, because the mean of its divisors is an integer number (12806640).

Almost surely, 2^257988734 is an apocalyptic number.

257988734 is a deficient number, since it is larger than the sum of its proper divisors (151823746).

257988734 is a wasteful number, since it uses less digits than its factorization.

257988734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944.

The product of its digits is 3386880, while the sum is 53.

The square root of 257988734 is about 16062.0277051187. The cubic root of 257988734 is about 636.6004096993.

The spelling of 257988734 in words is "two hundred fifty-seven million, nine hundred eighty-eight thousand, seven hundred thirty-four".