406909656 has 40 divisors (see below), whose sum is σ = 1139725620. Its totient is φ = 135636336.

The previous prime is 406909631. The next prime is 406909669. The reversal of 406909656 is 656909604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 313326 + ... + 314621.

Almost surely, 2^406909656 is an apocalyptic number.

It is an amenable number.

406909656 is an abundant number, since it is smaller than the sum of its proper divisors (732815964).

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

406909656 is a wasteful number, since it uses less digits than its factorization.

406909656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627965 (or 627952 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 406909656 is about 20172.0017846519. The cubic root of 406909656 is about 741.0246676703.

The spelling of 406909656 in words is "four hundred six million, nine hundred nine thousand, six hundred fifty-six".