445431872 has 28 divisors (see below), whose sum is σ = 905467836. Its totient is φ = 217282560.

The previous prime is 445431871. The next prime is 445431881. The reversal of 445431872 is 278134544.

It can be written as a sum of positive squares in 2 ways, for example, as 268435456 + 176996416 = 16384^2 + 13304^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (445431871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82253 + ... + 87500.

It is an arithmetic number, because the mean of its divisors is an integer number (32338137).

Almost surely, 2^445431872 is an apocalyptic number.

It is an amenable number.

445431872 is an abundant number, since it is smaller than the sum of its proper divisors (460035964).

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

445431872 is a wasteful number, since it uses less digits than its factorization.

445431872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169806 (or 169796 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

The square root of 445431872 is about 21105.2569754552. The cubic root of 445431872 is about 763.7075715361.

The spelling of 445431872 in words is "four hundred forty-five million, four hundred thirty-one thousand, eight hundred seventy-two".