420636630 has 96 divisors (see below), whose sum is σ = 1091692800. Its totient is φ = 103438080.

The previous prime is 420636617. The next prime is 420636641. The reversal of 420636630 is 36636024.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 957951 + ... + 958389.

It is an arithmetic number, because the mean of its divisors is an integer number (11371800).

Almost surely, 2^420636630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420636630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545846400).

420636630 is an abundant number, since it is smaller than the sum of its proper divisors (671056170).

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

420636630 is a wasteful number, since it uses less digits than its factorization.

420636630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 420636630 is about 20509.4278320971. The cubic root of 420636630 is about 749.2654318923.

The spelling of 420636630 in words is "four hundred twenty million, six hundred thirty-six thousand, six hundred thirty".