257720612 has 48 divisors (see below), whose sum is σ = 500774400. Its totient is φ = 115433472.

The previous prime is 257720563. The next prime is 257720621. The reversal of 257720612 is 216027752.

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, 573764 + ... + 574212.

It is an arithmetic number, because the mean of its divisors is an integer number (10432800).

Almost surely, 2^257720612 is an apocalyptic number.

It is an amenable number.

257720612 is a deficient number, since it is larger than the sum of its proper divisors (243053788).

257720612 is a wasteful number, since it uses less digits than its factorization.

257720612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 257720612 is about 16053.6790798870. The cubic root of 257720612 is about 636.3797983354.

The spelling of 257720612 in words is "two hundred fifty-seven million, seven hundred twenty thousand, six hundred twelve".