3646872 has 24 divisors (see below), whose sum is σ = 9877140. Its totient is φ = 1215600.

The previous prime is 3646859. The next prime is 3646883. The reversal of 3646872 is 2786463.

3646872 is a `hidden beast` number, since 3 + 646 + 8 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 in 5 ways as a sum of consecutive naturals, for example, 25254 + ... + 25397.

Almost surely, 2^3646872 is an apocalyptic number.

It is an amenable number.

3646872 is an abundant number, since it is smaller than the sum of its proper divisors (6230268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3646872 is a wasteful number, since it uses less digits than its factorization.

3646872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50663 (or 50656 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 3646872 is about 1909.6785069744. The cubic root of 3646872 is about 153.9241769879.

The spelling of 3646872 in words is "three million, six hundred forty-six thousand, eight hundred seventy-two".