420739660 has 24 divisors (see below), whose sum is σ = 963876816. Its totient is φ = 152996160.

The previous prime is 420739651. The next prime is 420739721. The reversal of 420739660 is 66937024.

It is a super-2 number, since 2×420739660² = 354043722993831200, which contains 22 as substring.

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, 956007 + ... + 956446.

It is an arithmetic number, because the mean of its divisors is an integer number (40161534).

Almost surely, 2^420739660 is an apocalyptic number.

It is an amenable number.

420739660 is an abundant number, since it is smaller than the sum of its proper divisors (543137156).

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

420739660 is a wasteful number, since it uses less digits than its factorization.

420739660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912473 (or 1912471 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 420739660 is about 20511.9394499886. The cubic root of 420739660 is about 749.3266014861.

The spelling of 420739660 in words is "four hundred twenty million, seven hundred thirty-nine thousand, six hundred sixty".