420404656 has 40 divisors (see below), whose sum is σ = 956064800. Its totient is φ = 175302144.

The previous prime is 420404653. The next prime is 420404689. The reversal of 420404656 is 656404024.

It is not an unprimeable number, because it can be changed into a prime (420404653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46581 + ... + 54868.

It is an arithmetic number, because the mean of its divisors is an integer number (23901620).

Almost surely, 2^420404656 is an apocalyptic number.

It is an amenable number.

420404656 is an abundant number, since it is smaller than the sum of its proper divisors (535660144).

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

420404656 is a wasteful number, since it uses less digits than its factorization.

420404656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101501 (or 101495 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 420404656 is about 20503.7717505829. The cubic root of 420404656 is about 749.1276708195.

The spelling of 420404656 in words is "four hundred twenty million, four hundred four thousand, six hundred fifty-six".