431163920 has 40 divisors (see below), whose sum is σ = 1093590720. Its totient is φ = 156786560.

The previous prime is 431163907. The next prime is 431163977. The reversal of 431163920 is 29361134.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244100 + ... + 245859.

It is an arithmetic number, because the mean of its divisors is an integer number (27339768).

Almost surely, 2^431163920 is an apocalyptic number.

431163920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431163920 is an abundant number, since it is smaller than the sum of its proper divisors (662426800).

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

431163920 is a wasteful number, since it uses less digits than its factorization.

431163920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489983 (or 489977 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 431163920 is about 20764.4869910142. The cubic root of 431163920 is about 755.4646322088.

The spelling of 431163920 in words is "four hundred thirty-one million, one hundred sixty-three thousand, nine hundred twenty".