406451656 has 32 divisors (see below), whose sum is σ = 823226040. Its totient is φ = 187020288.

The previous prime is 406451627. The next prime is 406451671. The reversal of 406451656 is 656154604.

It can be written as a sum of positive squares in 4 ways, for example, as 315630756 + 90820900 = 17766^2 + 9530^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29250 + ... + 40846.

Almost surely, 2^406451656 is an apocalyptic number.

It is an amenable number.

406451656 is an abundant number, since it is smaller than the sum of its proper divisors (416774384).

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

406451656 is a wasteful number, since it uses less digits than its factorization.

406451656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11953 (or 11949 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 406451656 is about 20160.6462198016. The cubic root of 406451656 is about 740.7465414684.

The spelling of 406451656 in words is "four hundred six million, four hundred fifty-one thousand, six hundred fifty-six".