431488644 has 12 divisors (see below), whose sum is σ = 1006806864. Its totient is φ = 143829544.

The previous prime is 431488609. The next prime is 431488657. The reversal of 431488644 is 446884134.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 431488596 and 431488605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17978682 + ... + 17978705.

It is an arithmetic number, because the mean of its divisors is an integer number (83900572).

Almost surely, 2^431488644 is an apocalyptic number.

It is an amenable number.

431488644 is an abundant number, since it is smaller than the sum of its proper divisors (575318220).

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

431488644 is a wasteful number, since it uses less digits than its factorization.

431488644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35957394 (or 35957392 counting only the distinct ones).

The product of its digits is 294912, while the sum is 42.

The square root of 431488644 is about 20772.3047349109. The cubic root of 431488644 is about 755.6542398623.

The spelling of 431488644 in words is "four hundred thirty-one million, four hundred eighty-eight thousand, six hundred forty-four".