636227420 has 12 divisors (see below), whose sum is σ = 1336077624. Its totient is φ = 254490960.

The previous prime is 636227411. The next prime is 636227429. The reversal of 636227420 is 24722636.

It is an interprime number because it is at equal distance from previous prime (636227411) and next prime (636227429).

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636227429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15905666 + ... + 15905705.

It is an arithmetic number, because the mean of its divisors is an integer number (111339802).

Almost surely, 2^636227420 is an apocalyptic number.

It is an amenable number.

636227420 is an abundant number, since it is smaller than the sum of its proper divisors (699850204).

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

636227420 is a wasteful number, since it uses less digits than its factorization.

636227420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31811380 (or 31811378 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 636227420 is about 25223.5489176285. The cubic root of 636227420 is about 860.0772510379.

The spelling of 636227420 in words is "six hundred thirty-six million, two hundred twenty-seven thousand, four hundred twenty".