406637868 has 72 divisors (see below), whose sum is σ = 1188656112. Its totient is φ = 107243136.

The previous prime is 406637857. The next prime is 406637873. The reversal of 406637868 is 868736604.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18955 + ... + 34242.

Almost surely, 2^406637868 is an apocalyptic number.

It is an amenable number.

406637868 is an abundant number, since it is smaller than the sum of its proper divisors (782018244).

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

406637868 is a wasteful number, since it uses less digits than its factorization.

406637868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53231 (or 53222 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 406637868 is about 20165.2638961160. The cubic root of 406637868 is about 740.8596462158.

The spelling of 406637868 in words is "four hundred six million, six hundred thirty-seven thousand, eight hundred sixty-eight".