3639672 has 24 divisors (see below), whose sum is σ = 9857640. Its totient is φ = 1213200.

The previous prime is 3639667. The next prime is 3639689. The reversal of 3639672 is 2769363.

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 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, 25204 + ... + 25347.

It is an arithmetic number, because the mean of its divisors is an integer number (410735).

Almost surely, 2^3639672 is an apocalyptic number.

It is an amenable number.

3639672 is an abundant number, since it is smaller than the sum of its proper divisors (6217968).

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

3639672 is a wasteful number, since it uses less digits than its factorization.

3639672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50563 (or 50556 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 3639672 is about 1907.7924415407. The cubic root of 3639672 is about 153.8228130231.

The spelling of 3639672 in words is "three million, six hundred thirty-nine thousand, six hundred seventy-two".