6863904 has 36 divisors (see below), whose sum is σ = 19520046. Its totient is φ = 2287872.

The previous prime is 6863897. The next prime is 6863939. The reversal of 6863904 is 4093686.

It can be written as a sum of positive squares in only one way, i.e., 4613904 + 2250000 = 2148^2 + 1500^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×6863904² = 94226356242432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11629 + ... + 12204.

Almost surely, 2^6863904 is an apocalyptic number.

It is an amenable number.

6863904 is an abundant number, since it is smaller than the sum of its proper divisors (12656142).

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

6863904 is a wasteful number, since it uses less digits than its factorization.

6863904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23849 (or 23838 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6863904 is about 2619.9053418015. The cubic root of 6863904 is about 190.0452708377.

The spelling of 6863904 in words is "six million, eight hundred sixty-three thousand, nine hundred four".