409057656 has 64 divisors (see below), whose sum is σ = 1197262080. Its totient is φ = 114021120.

The previous prime is 409057639. The next prime is 409057703. The reversal of 409057656 is 656750904.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 22806 + ... + 36581.

It is an arithmetic number, because the mean of its divisors is an integer number (18707220).

Almost surely, 2^409057656 is an apocalyptic number.

It is an amenable number.

409057656 is an abundant number, since it is smaller than the sum of its proper divisors (788204424).

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

409057656 is a wasteful number, since it uses less digits than its factorization.

409057656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59444 (or 59440 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 409057656 is about 20225.1738187834. The cubic root of 409057656 is about 742.3262902366.

The spelling of 409057656 in words is "four hundred nine million, fifty-seven thousand, six hundred fifty-six".