420564280 has 32 divisors (see below), whose sum is σ = 950217840. Its totient is φ = 167523840.

The previous prime is 420564253. The next prime is 420564299. The reversal of 420564280 is 82465024.

It is a super-2 number, since 2×420564280² = 353748627223836800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12174 + ... + 31453.

Almost surely, 2^420564280 is an apocalyptic number.

420564280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420564280 is an abundant number, since it is smaller than the sum of its proper divisors (529653560).

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

420564280 is a wasteful number, since it uses less digits than its factorization.

420564280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43879 (or 43875 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 420564280 is about 20507.6639332714. The cubic root of 420564280 is about 749.2224712476. Note that the first 3 decimals are identical.

The spelling of 420564280 in words is "four hundred twenty million, five hundred sixty-four thousand, two hundred eighty".