420605636 has 24 divisors (see below), whose sum is σ = 850209696. Its totient is φ = 179937920.

The previous prime is 420605629. The next prime is 420605651. The reversal of 420605636 is 636506024.

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, 280406 + ... + 281901.

It is an arithmetic number, because the mean of its divisors is an integer number (35425404).

Almost surely, 2^420605636 is an apocalyptic number.

It is an amenable number.

420605636 is an abundant number, since it is smaller than the sum of its proper divisors (429604060).

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

420605636 is a wasteful number, since it uses less digits than its factorization.

420605636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562339 (or 562337 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 420605636 is about 20508.6722144560. The cubic root of 420605636 is about 749.2470285947.

The spelling of 420605636 in words is "four hundred twenty million, six hundred five thousand, six hundred thirty-six".