3639372 has 48 divisors (see below), whose sum is σ = 9408000. Its totient is φ = 1085760.

The previous prime is 3639347. The next prime is 3639379. The reversal of 3639372 is 2739363.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (3639379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10254 + ... + 10602.

It is an arithmetic number, because the mean of its divisors is an integer number (196000).

Almost surely, 2^3639372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3639372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4704000).

3639372 is an abundant number, since it is smaller than the sum of its proper divisors (5768628).

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

3639372 is a wasteful number, since it uses less digits than its factorization.

3639372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 444 counting only the distinct ones).

The product of its digits is 20412, while the sum is 33.

The square root of 3639372 is about 1907.7138150152. The cubic root of 3639372 is about 153.8185866247.

Subtracting from 3639372 its reverse (2739363), we obtain a palindrome (900009).

The spelling of 3639372 in words is "three million, six hundred thirty-nine thousand, three hundred seventy-two".