2688904 has 8 divisors (see below), whose sum is σ = 5041710. Its totient is φ = 1344448.

The previous prime is 2688887. The next prime is 2688913. The reversal of 2688904 is 4098862.

It can be written as a sum of positive squares in only one way, i.e., 2566404 + 122500 = 1602^2 + 350^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168049 + ... + 168064.

2^2688904 is an apocalyptic number.

It is an amenable number.

2688904 is a deficient number, since it is larger than the sum of its proper divisors (2352806).

2688904 is a wasteful number, since it uses less digits than its factorization.

2688904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336119 (or 336115 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 2688904 is about 1639.7877911486. The cubic root of 2688904 is about 139.0566509933.

The spelling of 2688904 in words is "two million, six hundred eighty-eight thousand, nine hundred four".