420939636 has 24 divisors (see below), whose sum is σ = 1057746144. Its totient is φ = 129519840.

The previous prime is 420939581. The next prime is 420939637. The reversal of 420939636 is 636939024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420939637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1349010 + ... + 1349321.

It is an arithmetic number, because the mean of its divisors is an integer number (44072756).

Almost surely, 2^420939636 is an apocalyptic number.

It is an amenable number.

420939636 is an abundant number, since it is smaller than the sum of its proper divisors (636806508).

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

420939636 is a wasteful number, since it uses less digits than its factorization.

420939636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698351 (or 2698349 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 420939636 is about 20516.8134952775. The cubic root of 420939636 is about 749.4453000673.

The spelling of 420939636 in words is "four hundred twenty million, nine hundred thirty-nine thousand, six hundred thirty-six".