256416040 has 16 divisors (see below), whose sum is σ = 576936180. Its totient is φ = 102566400.

The previous prime is 256416007. The next prime is 256416053. The reversal of 256416040 is 40614652.

It can be written as a sum of positive squares in 2 ways, for example, as 254657764 + 1758276 = 15958^2 + 1326^2 .

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, 3205161 + ... + 3205240.

Almost surely, 2^256416040 is an apocalyptic number.

256416040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256416040 is an abundant number, since it is smaller than the sum of its proper divisors (320520140).

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

256416040 is a wasteful number, since it uses less digits than its factorization.

256416040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410412 (or 6410408 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 256416040 is about 16012.9959720222. The cubic root of 256416040 is about 635.3042045858.

The spelling of 256416040 in words is "two hundred fifty-six million, four hundred sixteen thousand, forty".