3904636 has 12 divisors (see below), whose sum is σ = 7053760. Its totient is φ = 1889280.

The previous prime is 3904631. The next prime is 3904639. The reversal of 3904636 is 6364093.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 3904598 and 3904607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3904631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15621 + ... + 15868.

Almost surely, 2^3904636 is an apocalyptic number.

It is an amenable number.

3904636 is a deficient number, since it is larger than the sum of its proper divisors (3149124).

3904636 is a wasteful number, since it uses less digits than its factorization.

3904636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31524 (or 31522 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 3904636 is about 1976.0151821279. The cubic root of 3904636 is about 157.4684374479.

The spelling of 3904636 in words is "three million, nine hundred four thousand, six hundred thirty-six".