406508388 has 48 divisors (see below), whose sum is σ = 1114349376. Its totient is φ = 113708160.

The previous prime is 406508359. The next prime is 406508423. The reversal of 406508388 is 883805604.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116731 + ... + 120162.

It is an arithmetic number, because the mean of its divisors is an integer number (23215612).

Almost surely, 2^406508388 is an apocalyptic number.

It is an amenable number.

406508388 is an abundant number, since it is smaller than the sum of its proper divisors (707840988).

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

406508388 is a wasteful number, since it uses less digits than its factorization.

406508388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236924 (or 236922 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 406508388 is about 20162.0531692583. The cubic root of 406508388 is about 740.7810040153.

The spelling of 406508388 in words is "four hundred six million, five hundred eight thousand, three hundred eighty-eight".