400256364 has 24 divisors (see below), whose sum is σ = 988869168. Its totient is φ = 125570560.

The previous prime is 400256359. The next prime is 400256369. The reversal of 400256364 is 463652004.

It is an interprime number because it is at equal distance from previous prime (400256359) and next prime (400256369).

It is not an unprimeable number, because it can be changed into a prime (400256369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980817 + ... + 981224.

It is an arithmetic number, because the mean of its divisors is an integer number (41202882).

Almost surely, 2^400256364 is an apocalyptic number.

It is an amenable number.

400256364 is an abundant number, since it is smaller than the sum of its proper divisors (588612804).

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

400256364 is a wasteful number, since it uses less digits than its factorization.

400256364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962065 (or 1962063 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 400256364 is about 20006.4080734149. The cubic root of 400256364 is about 736.9636749536.

The spelling of 400256364 in words is "four hundred million, two hundred fifty-six thousand, three hundred sixty-four".