431431688 has 16 divisors (see below), whose sum is σ = 811523580. Its totient is φ = 215025408.

The previous prime is 431431673. The next prime is 431431699. The reversal of 431431688 is 886134134.

It can be written as a sum of positive squares in 2 ways, for example, as 236605924 + 194825764 = 15382^2 + 13958^2 .

It is a super-2 number, since 2×431431688² = 372266602821058688, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 83645 + ... + 88652.

Almost surely, 2^431431688 is an apocalyptic number.

It is an amenable number.

431431688 is a deficient number, since it is larger than the sum of its proper divisors (380091892).

431431688 is a wasteful number, since it uses less digits than its factorization.

431431688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172616 (or 172612 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 431431688 is about 20770.9337296136. The cubic root of 431431688 is about 755.6209899052.

The spelling of 431431688 in words is "four hundred thirty-one million, four hundred thirty-one thousand, six hundred eighty-eight".