257738070 has 32 divisors (see below), whose sum is σ = 621312768. Its totient is φ = 68425568.

The previous prime is 257738017. The next prime is 257738077. The reversal of 257738070 is 70837752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257738077) 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, 12114 + ... + 25733.

It is an arithmetic number, because the mean of its divisors is an integer number (19416024).

Almost surely, 2^257738070 is an apocalyptic number.

257738070 is an abundant number, since it is smaller than the sum of its proper divisors (363574698).

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

257738070 is a wasteful number, since it uses less digits than its factorization.

257738070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38084.

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 257738070 is about 16054.2228089684. Note that the first 3 decimals coincide. The cubic root of 257738070 is about 636.3941674715.

The spelling of 257738070 in words is "two hundred fifty-seven million, seven hundred thirty-eight thousand, seventy".