1636397304 has 16 divisors (see below), whose sum is σ = 4090993320. Its totient is φ = 545465760.

The previous prime is 1636397303. The next prime is 1636397311. The reversal of 1636397304 is 4037936361.

It is a super-2 number, since 2×1636397304² = 5355592273076936832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636397303) 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, 34091587 + ... + 34091634.

Almost surely, 2^1636397304 is an apocalyptic number.

It is an amenable number.

1636397304 is an abundant number, since it is smaller than the sum of its proper divisors (2454596016).

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

1636397304 is a wasteful number, since it uses less digits than its factorization.

1636397304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68183230 (or 68183226 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 42.

The square root of 1636397304 is about 40452.4078887772. The cubic root of 1636397304 is about 1178.4095454927.

The spelling of 1636397304 in words is "one billion, six hundred thirty-six million, three hundred ninety-seven thousand, three hundred four".