420426664 has 24 divisors (see below), whose sum is σ = 917002890. Its totient is φ = 180182688.

The previous prime is 420426649. The next prime is 420426667. The reversal of 420426664 is 466624024.

It can be written as a sum of positive squares in only one way, i.e., 355624164 + 64802500 = 18858^2 + 8050^2 .

It is not an unprimeable number, because it can be changed into a prime (420426667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 535867 + ... + 536650.

Almost surely, 2^420426664 is an apocalyptic number.

It is an amenable number.

420426664 is an abundant number, since it is smaller than the sum of its proper divisors (496576226).

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

420426664 is a wasteful number, since it uses less digits than its factorization.

420426664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072537 (or 1072526 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 420426664 is about 20504.3084253042. The cubic root of 420426664 is about 749.1407427601.

The spelling of 420426664 in words is "four hundred twenty million, four hundred twenty-six thousand, six hundred sixty-four".