3638996 has 12 divisors (see below), whose sum is σ = 6523860. Its totient is φ = 1775040.

The previous prime is 3638993. The next prime is 3639017. The reversal of 3638996 is 6998363.

It can be written as a sum of positive squares in 2 ways, for example, as 1123600 + 2515396 = 1060^2 + 1586^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10931 + ... + 11258.

It is an arithmetic number, because the mean of its divisors is an integer number (543655).

Almost surely, 2^3638996 is an apocalyptic number.

It is an amenable number.

3638996 is a deficient number, since it is larger than the sum of its proper divisors (2884864).

3638996 is a wasteful number, since it uses less digits than its factorization.

3638996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22234 (or 22232 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 3638996 is about 1907.6152651937. The cubic root of 3638996 is about 153.8132892107.

The spelling of 3638996 in words is "three million, six hundred thirty-eight thousand, nine hundred ninety-six".