258315856 has 20 divisors (see below), whose sum is σ = 503033652. Its totient is φ = 128500736.

The previous prime is 258315823. The next prime is 258315877. The reversal of 258315856 is 658513852.

258315856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 177315856 + 81000000 = 13316^2 + 9000^2 .

It is a super-2 number, since 2×258315856² = 133454162922025472, which contains 22 as substring.

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, 37825 + ... + 44128.

Almost surely, 2^258315856 is an apocalyptic number.

It is an amenable number.

258315856 is a deficient number, since it is larger than the sum of its proper divisors (244717796).

258315856 is a wasteful number, since it uses less digits than its factorization.

258315856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82158 (or 82152 counting only the distinct ones).

The product of its digits is 288000, while the sum is 43.

The square root of 258315856 is about 16072.2075646129. The cubic root of 258315856 is about 636.8693594856.

The spelling of 258315856 in words is "two hundred fifty-eight million, three hundred fifteen thousand, eight hundred fifty-six".