3691904 has 16 divisors (see below), whose sum is σ = 7355220. Its totient is φ = 1845888.

The previous prime is 3691859. The next prime is 3691913. The reversal of 3691904 is 4091963.

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

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14294 + ... + 14549.

Almost surely, 2^3691904 is an apocalyptic number.

It is an amenable number.

3691904 is a deficient number, since it is larger than the sum of its proper divisors (3663316).

3691904 is an equidigital number, since it uses as much as digits as its factorization.

3691904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28857 (or 28845 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 3691904 is about 1921.4327987208. The cubic root of 3691904 is about 154.5551448679. Note that the first 3 decimals are identical.

The spelling of 3691904 in words is "three million, six hundred ninety-one thousand, nine hundred four".