6859904 has 16 divisors (see below), whose sum is σ = 13666470. Its totient is φ = 3429888.

The previous prime is 6859901. The next prime is 6859933. The reversal of 6859904 is 4099586.

It can be written as a sum of positive squares in only one way, i.e., 5953600 + 906304 = 2440^2 + 952^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (6859901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26669 + ... + 26924.

Almost surely, 2^6859904 is an apocalyptic number.

6859904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6859904 is a deficient number, since it is larger than the sum of its proper divisors (6806566).

6859904 is an equidigital number, since it uses as much as digits as its factorization.

6859904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53607 (or 53595 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 6859904 is about 2619.1418441925. The cubic root of 6859904 is about 190.0083468171.

The spelling of 6859904 in words is "six million, eight hundred fifty-nine thousand, nine hundred four".