256810416 has 20 divisors (see below), whose sum is σ = 663427032. Its totient is φ = 85603456.

The previous prime is 256810391. The next prime is 256810439. The reversal of 256810416 is 614018652.

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, 2675061 + ... + 2675156.

Almost surely, 2^256810416 is an apocalyptic number.

It is an amenable number.

256810416 is an abundant number, since it is smaller than the sum of its proper divisors (406616616).

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

256810416 is a wasteful number, since it uses less digits than its factorization.

256810416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350228 (or 5350222 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 256810416 is about 16025.3054885079. The cubic root of 256810416 is about 635.6297437499.

The spelling of 256810416 in words is "two hundred fifty-six million, eight hundred ten thousand, four hundred sixteen".