636468252 has 36 divisors (see below), whose sum is σ = 1727558280. Its totient is φ = 181847904.

The previous prime is 636468199. The next prime is 636468263. The reversal of 636468252 is 252864636.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 540627 + ... + 541802.

It is an arithmetic number, because the mean of its divisors is an integer number (47987730).

Almost surely, 2^636468252 is an apocalyptic number.

It is an amenable number.

636468252 is an abundant number, since it is smaller than the sum of its proper divisors (1091090028).

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

636468252 is a wasteful number, since it uses less digits than its factorization.

636468252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082450 (or 1082441 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 636468252 is about 25228.3224174736. The cubic root of 636468252 is about 860.1857594045.

The spelling of 636468252 in words is "six hundred thirty-six million, four hundred sixty-eight thousand, two hundred fifty-two".