420890928 has 20 divisors (see below), whose sum is σ = 1087301688. Its totient is φ = 140296960.

The previous prime is 420890927. The next prime is 420890929. The reversal of 420890928 is 829098024.

It is an interprime number because it is at equal distance from previous prime (420890927) and next prime (420890929).

It is a self number, because there is not a number n which added to its sum of digits gives 420890928.

It is not an unprimeable number, because it can be changed into a prime (420890927) 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 3 ways as a sum of consecutive naturals, for example, 4384233 + ... + 4384328.

Almost surely, 2^420890928 is an apocalyptic number.

420890928 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

420890928 is an abundant number, since it is smaller than the sum of its proper divisors (666410760).

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

420890928 is a wasteful number, since it uses less digits than its factorization.

420890928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768572 (or 8768566 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 420890928 is about 20515.6264345011. The cubic root of 420890928 is about 749.4163922093.

The spelling of 420890928 in words is "four hundred twenty million, eight hundred ninety thousand, nine hundred twenty-eight".