863988204 has 12 divisors (see below), whose sum is σ = 2015972504. Its totient is φ = 287996064.

The previous prime is 863988187. The next prime is 863988217. The reversal of 863988204 is 402889368.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×863988204² = 1492951233302291232, which contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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, 35999497 + ... + 35999520.

Almost surely, 2^863988204 is an apocalyptic number.

It is an amenable number.

863988204 is an abundant number, since it is smaller than the sum of its proper divisors (1151984300).

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

863988204 is a wasteful number, since it uses less digits than its factorization.

863988204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71999024 (or 71999022 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 863988204 is about 29393.6762586785. The cubic root of 863988204 is about 952.4362966744.

The spelling of 863988204 in words is "eight hundred sixty-three million, nine hundred eighty-eight thousand, two hundred four".