420028508 has 12 divisors (see below), whose sum is σ = 735379512. Its totient is φ = 209920080.

The previous prime is 420028501. The next prime is 420028513. The reversal of 420028508 is 805820024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420028501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12983 + ... + 31758.

It is an arithmetic number, because the mean of its divisors is an integer number (61281626).

Almost surely, 2^420028508 is an apocalyptic number.

It is an amenable number.

420028508 is a deficient number, since it is larger than the sum of its proper divisors (315351004).

420028508 is a wasteful number, since it uses less digits than its factorization.

420028508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47092 (or 47090 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 420028508 is about 20494.5970440992. The cubic root of 420028508 is about 748.9041822095.

The spelling of 420028508 in words is "four hundred twenty million, twenty-eight thousand, five hundred eight".