256222736 has 40 divisors (see below), whose sum is σ = 618930624. Its totient is φ = 99826560.

The previous prime is 256222727. The next prime is 256222873. The reversal of 256222736 is 637222652.

It is a junction number, because it is equal to n+sod(n) for n = 256222696 and 256222705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102755 + ... + 105218.

Almost surely, 2^256222736 is an apocalyptic number.

It is an amenable number.

256222736 is an abundant number, since it is smaller than the sum of its proper divisors (362707888).

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

256222736 is a wasteful number, since it uses less digits than its factorization.

256222736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207999 (or 207993 counting only the distinct ones).

The product of its digits is 60480, while the sum is 35.

The square root of 256222736 is about 16006.9589866408. The cubic root of 256222736 is about 635.1445191556.

The spelling of 256222736 in words is "two hundred fifty-six million, two hundred twenty-two thousand, seven hundred thirty-six".