420556164 has 24 divisors (see below), whose sum is σ = 1121483328. Its totient is φ = 120158880.

The previous prime is 420556163. The next prime is 420556177. The reversal of 420556164 is 461655024.

It is not an unprimeable number, because it can be changed into a prime (420556163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2503227 + ... + 2503394.

It is an arithmetic number, because the mean of its divisors is an integer number (46728472).

Almost surely, 2^420556164 is an apocalyptic number.

It is an amenable number.

420556164 is an abundant number, since it is smaller than the sum of its proper divisors (700927164).

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

420556164 is a wasteful number, since it uses less digits than its factorization.

420556164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006635 (or 5006633 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 420556164 is about 20507.4660550737. The cubic root of 420556164 is about 749.2176517476.

The spelling of 420556164 in words is "four hundred twenty million, five hundred fifty-six thousand, one hundred sixty-four".