404545644 has 48 divisors (see below), whose sum is σ = 1104028800. Its totient is φ = 127750608.

The previous prime is 404545637. The next prime is 404545667. The reversal of 404545644 is 446545404.

404545644 is a `hidden beast` number, since 4 + 0 + 4 + 5 + 4 + 5 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 404545599 and 404545608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96522 + ... + 100625.

It is an arithmetic number, because the mean of its divisors is an integer number (23000600).

Almost surely, 2^404545644 is an apocalyptic number.

It is an amenable number.

404545644 is an abundant number, since it is smaller than the sum of its proper divisors (699483156).

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

404545644 is a wasteful number, since it uses less digits than its factorization.

404545644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197179 (or 197171 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

The square root of 404545644 is about 20113.3200640769. The cubic root of 404545644 is about 739.5868426581.

The spelling of 404545644 in words is "four hundred four million, five hundred forty-five thousand, six hundred forty-four".