400536144 has 40 divisors (see below), whose sum is σ = 1149688320. Its totient is φ = 133511904.

The previous prime is 400536121. The next prime is 400536173. The reversal of 400536144 is 441635004.

400536144 is a `hidden beast` number, since 40 + 0 + 5 + 3 + 614 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 7 ways as a sum of consecutive naturals, for example, 463152 + ... + 464015.

It is an arithmetic number, because the mean of its divisors is an integer number (28742208).

Almost surely, 2^400536144 is an apocalyptic number.

It is an amenable number.

400536144 is an abundant number, since it is smaller than the sum of its proper divisors (749152176).

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

400536144 is a wasteful number, since it uses less digits than its factorization.

400536144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927184 (or 927172 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 400536144 is about 20013.3991115952. The cubic root of 400536144 is about 737.1353479881.

The spelling of 400536144 in words is "four hundred million, five hundred thirty-six thousand, one hundred forty-four".