256400466 has 32 divisors (see below), whose sum is σ = 586535040. Its totient is φ = 73197696.

The previous prime is 256400461. The next prime is 256400483. The reversal of 256400466 is 664004652.

It is not an unprimeable number, because it can be changed into a prime (256400461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92590 + ... + 95318.

It is an arithmetic number, because the mean of its divisors is an integer number (18329220).

Almost surely, 2^256400466 is an apocalyptic number.

256400466 is an abundant number, since it is smaller than the sum of its proper divisors (330134574).

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

256400466 is a wasteful number, since it uses less digits than its factorization.

256400466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4978.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 256400466 is about 16012.5096721282. The cubic root of 256400466 is about 635.2913421195.

The spelling of 256400466 in words is "two hundred fifty-six million, four hundred thousand, four hundred sixty-six".