3639924 has 24 divisors (see below), whose sum is σ = 9437120. Its totient is φ = 1213272.

The previous prime is 3639919. The next prime is 3639929. The reversal of 3639924 is 4299363.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3639919) and next prime (3639929).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16744 + ... + 16959.

Almost surely, 2^3639924 is an apocalyptic number.

It is an amenable number.

3639924 is an abundant number, since it is smaller than the sum of its proper divisors (5797196).

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

3639924 is a wasteful number, since it uses less digits than its factorization.

3639924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33716 (or 33708 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 3639924 is about 1907.8584853180. The cubic root of 3639924 is about 153.8263630183.

The spelling of 3639924 in words is "three million, six hundred thirty-nine thousand, nine hundred twenty-four".