400564055 has 16 divisors (see below), whose sum is σ = 494381664. Its totient is φ = 311377920.

The previous prime is 400563937. The next prime is 400564063. The reversal of 400564055 is 550465004.

It is not a de Polignac number, because 400564055 - 2⁸ = 400563799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48884 + ... + 56486.

It is an arithmetic number, because the mean of its divisors is an integer number (30898854).

Almost surely, 2^400564055 is an apocalyptic number.

400564055 is a deficient number, since it is larger than the sum of its proper divisors (93817609).

400564055 is a wasteful number, since it uses less digits than its factorization.

400564055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7906.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 400564055 is about 20014.0964072825. The cubic root of 400564055 is about 737.1524697944.

The spelling of 400564055 in words is "four hundred million, five hundred sixty-four thousand, fifty-five".