636402116 has 24 divisors (see below), whose sum is σ = 1276032576. Its totient is φ = 272052000.

The previous prime is 636402103. The next prime is 636402119. The reversal of 636402116 is 611204636.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (636402119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17510 + ... + 39741.

It is an arithmetic number, because the mean of its divisors is an integer number (53168024).

Almost surely, 2^636402116 is an apocalyptic number.

It is an amenable number.

636402116 is an abundant number, since it is smaller than the sum of its proper divisors (639630460).

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

636402116 is a wasteful number, since it uses less digits than its factorization.

636402116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57659 (or 57657 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 636402116 is about 25227.0116343573. The cubic root of 636402116 is about 860.1559641420.

It can be divided in two parts, 63640 and 2116, that added together give a palindrome (65756).

The spelling of 636402116 in words is "six hundred thirty-six million, four hundred two thousand, one hundred sixteen".