406261656 has 40 divisors (see below), whose sum is σ = 1137910620. Its totient is φ = 135420336.

The previous prime is 406261637. The next prime is 406261657. The reversal of 406261656 is 656162604.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 406261656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406261657) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 312826 + ... + 314121.

Almost surely, 2^406261656 is an apocalyptic number.

It is an amenable number.

406261656 is an abundant number, since it is smaller than the sum of its proper divisors (731648964).

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

406261656 is a wasteful number, since it uses less digits than its factorization.

406261656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626965 (or 626952 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 406261656 is about 20155.9335184456. The cubic root of 406261656 is about 740.6311002862.

The spelling of 406261656 in words is "four hundred six million, two hundred sixty-one thousand, six hundred fifty-six".