636452540 has 24 divisors (see below), whose sum is σ = 1372674912. Its totient is φ = 247700160.

The previous prime is 636452539. The next prime is 636452587. The reversal of 636452540 is 45254636.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 636452540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429296 + ... + 430775.

It is an arithmetic number, because the mean of its divisors is an integer number (57194788).

Almost surely, 2^636452540 is an apocalyptic number.

It is an amenable number.

636452540 is an abundant number, since it is smaller than the sum of its proper divisors (736222372).

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

636452540 is a wasteful number, since it uses less digits than its factorization.

636452540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860117 (or 860115 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 636452540 is about 25228.0110194997. The cubic root of 636452540 is about 860.1786810992.

The spelling of 636452540 in words is "six hundred thirty-six million, four hundred fifty-two thousand, five hundred forty".