2256639858 has 64 divisors (see below), whose sum is σ = 5587107840. Its totient is φ = 669272400.

The previous prime is 2256639829. The next prime is 2256639887. The reversal of 2256639858 is 8589366522.

2256639858 is a `hidden beast` number, since 22 + 566 + 3 + 9 + 8 + 58 = 666.

It is an interprime number because it is at equal distance from previous prime (2256639829) and next prime (2256639887).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12498 + ... + 68333.

It is an arithmetic number, because the mean of its divisors is an integer number (87298560).

Almost surely, 2^2256639858 is an apocalyptic number.

2256639858 is an abundant number, since it is smaller than the sum of its proper divisors (3330467982).

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

2256639858 is a wasteful number, since it uses less digits than its factorization.

2256639858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80900 (or 80894 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 2256639858 is about 47504.1035911636. The cubic root of 2256639858 is about 1311.6584201647.

The spelling of 2256639858 in words is "two billion, two hundred fifty-six million, six hundred thirty-nine thousand, eight hundred fifty-eight".