168431408 has 10 divisors (see below), whose sum is σ = 326335884. Its totient is φ = 84215696.

The previous prime is 168431407. The next prime is 168431423. The reversal of 168431408 is 804134861.

It is not an unprimeable number, because it can be changed into a prime (168431407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5263466 + ... + 5263497.

Almost surely, 2^168431408 is an apocalyptic number.

It is an amenable number.

168431408 is a deficient number, since it is larger than the sum of its proper divisors (157904476).

168431408 is a wasteful number, since it uses less digits than its factorization.

168431408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10526971 (or 10526965 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 168431408 is about 12978.1126516917. The cubic root of 168431408 is about 552.2567418714.

The spelling of 168431408 in words is "one hundred sixty-eight million, four hundred thirty-one thousand, four hundred eight".