3655972 has 12 divisors (see below), whose sum is σ = 6618780. Its totient is φ = 1764896.

The previous prime is 3655957. The next prime is 3655987. The reversal of 3655972 is 2795563.

3655972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3655957) and next prime (3655987).

It can be written as a sum of positive squares in 2 ways, for example, as 1115136 + 2540836 = 1056^2 + 1594^2 .

It is a super-2 number, since 2×3655972² = 26732262529568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15643 + ... + 15874.

It is an arithmetic number, because the mean of its divisors is an integer number (551565).

Almost surely, 2^3655972 is an apocalyptic number.

It is an amenable number.

3655972 is a deficient number, since it is larger than the sum of its proper divisors (2962808).

3655972 is a wasteful number, since it uses less digits than its factorization.

3655972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31550 (or 31548 counting only the distinct ones).

The product of its digits is 56700, while the sum is 37.

The square root of 3655972 is about 1912.0596225013. The cubic root of 3655972 is about 154.0520990870.

The spelling of 3655972 in words is "three million, six hundred fifty-five thousand, nine hundred seventy-two".