420606636 has 36 divisors (see below), whose sum is σ = 1014123096. Its totient is φ = 135675840.

The previous prime is 420606631. The next prime is 420606643. The reversal of 420606636 is 636606024.

It is a junction number, because it is equal to n+sod(n) for n = 420606597 and 420606606.

It is not an unprimeable number, because it can be changed into a prime (420606631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6705 + ... + 29768.

It is an arithmetic number, because the mean of its divisors is an integer number (28170086).

Almost surely, 2^420606636 is an apocalyptic number.

It is an amenable number.

420606636 is an abundant number, since it is smaller than the sum of its proper divisors (593516460).

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

420606636 is a wasteful number, since it uses less digits than its factorization.

420606636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36542 (or 36509 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 420606636 is about 20508.6965943719. The cubic root of 420606636 is about 749.2476223785.

The spelling of 420606636 in words is "four hundred twenty million, six hundred six thousand, six hundred thirty-six".