405053644 has 24 divisors (see below), whose sum is σ = 752209920. Its totient is φ = 190435344.

The previous prime is 405053639. The next prime is 405053687. The reversal of 405053644 is 446350504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31884 + ... + 42739.

It is an arithmetic number, because the mean of its divisors is an integer number (31342080).

Almost surely, 2^405053644 is an apocalyptic number.

It is an amenable number.

405053644 is a deficient number, since it is larger than the sum of its proper divisors (347156276).

405053644 is a wasteful number, since it uses less digits than its factorization.

405053644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74709 (or 74707 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 405053644 is about 20125.9445492628. The cubic root of 405053644 is about 739.8962869016.

The spelling of 405053644 in words is "four hundred five million, fifty-three thousand, six hundred forty-four".