431323688 has 8 divisors (see below), whose sum is σ = 808731930. Its totient is φ = 215661840.

The previous prime is 431323687. The next prime is 431323691. The reversal of 431323688 is 886323134.

It can be written as a sum of positive squares in only one way, i.e., 270997444 + 160326244 = 16462^2 + 12662^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (431323687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26957723 + ... + 26957738.

Almost surely, 2^431323688 is an apocalyptic number.

It is an amenable number.

431323688 is a deficient number, since it is larger than the sum of its proper divisors (377408242).

431323688 is a wasteful number, since it uses less digits than its factorization.

431323688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53915467 (or 53915463 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 431323688 is about 20768.3337800605. Note that the first 3 decimals coincide. The cubic root of 431323688 is about 755.5579332810.

The spelling of 431323688 in words is "four hundred thirty-one million, three hundred twenty-three thousand, six hundred eighty-eight".