257070770 has 128 divisors (see below), whose sum is σ = 574801920. Its totient is φ = 81607680.

The previous prime is 257070769. The next prime is 257070791. The reversal of 257070770 is 77070752.

It is a self number, because there is not a number n which added to its sum of digits gives 257070770.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1849361 + ... + 1849499.

It is an arithmetic number, because the mean of its divisors is an integer number (4490640).

Almost surely, 2^257070770 is an apocalyptic number.

257070770 is an abundant number, since it is smaller than the sum of its proper divisors (317731150).

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

257070770 is a wasteful number, since it uses less digits than its factorization.

257070770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240.

The product of its (nonzero) digits is 24010, while the sum is 35.

The square root of 257070770 is about 16033.4266456051. The cubic root of 257070770 is about 635.8444713511.

The spelling of 257070770 in words is "two hundred fifty-seven million, seventy thousand, seven hundred seventy".