3649972 has 12 divisors (see below), whose sum is σ = 6430816. Its totient is φ = 1812600.

The previous prime is 3649967. The next prime is 3649981. The reversal of 3649972 is 2799463.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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, 2418 + ... + 3625.

Almost surely, 2^3649972 is an apocalyptic number.

It is an amenable number.

3649972 is a deficient number, since it is larger than the sum of its proper divisors (2780844).

3649972 is a wasteful number, since it uses less digits than its factorization.

3649972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6198 (or 6196 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 3649972 is about 1910.4899895053. The cubic root of 3649972 is about 153.9677787201.

The spelling of 3649972 in words is "three million, six hundred forty-nine thousand, nine hundred seventy-two".