636409412 has 12 divisors (see below), whose sum is σ = 1115849616. Its totient is φ = 317595240.

The previous prime is 636409409. The next prime is 636409453. The reversal of 636409412 is 214904636.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150014 + ... + 154197.

It is an arithmetic number, because the mean of its divisors is an integer number (92987468).

Almost surely, 2^636409412 is an apocalyptic number.

It is an amenable number.

636409412 is a deficient number, since it is larger than the sum of its proper divisors (479440204).

636409412 is a wasteful number, since it uses less digits than its factorization.

636409412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304738 (or 304736 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 636409412 is about 25227.1562408449. The cubic root of 636409412 is about 860.1592512010.

The spelling of 636409412 in words is "six hundred thirty-six million, four hundred nine thousand, four hundred twelve".