406505136 has 20 divisors (see below), whose sum is σ = 1050138392. Its totient is φ = 135501696.

The previous prime is 406505089. The next prime is 406505179. The reversal of 406505136 is 631505604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4234381 + ... + 4234476.

Almost surely, 2^406505136 is an apocalyptic number.

It is an amenable number.

406505136 is an abundant number, since it is smaller than the sum of its proper divisors (643633256).

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

406505136 is a wasteful number, since it uses less digits than its factorization.

406505136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8468868 (or 8468862 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 406505136 is about 20161.9725225485. The cubic root of 406505136 is about 740.7790286347.

The spelling of 406505136 in words is "four hundred six million, five hundred five thousand, one hundred thirty-six".