256870072 has 16 divisors (see below), whose sum is σ = 502572240. Its totient is φ = 122850816.

The previous prime is 256870067. The next prime is 256870093. The reversal of 256870072 is 270078652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697833 + ... + 698200.

It is an arithmetic number, because the mean of its divisors is an integer number (31410765).

Almost surely, 2^256870072 is an apocalyptic number.

It is an amenable number.

256870072 is a deficient number, since it is larger than the sum of its proper divisors (245702168).

256870072 is a wasteful number, since it uses less digits than its factorization.

256870072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396062 (or 1396058 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 256870072 is about 16027.1666865981. The cubic root of 256870072 is about 635.6789579950.

The spelling of 256870072 in words is "two hundred fifty-six million, eight hundred seventy thousand, seventy-two".