3639900 has 72 divisors (see below), whose sum is σ = 11499264. Its totient is φ = 881600.

The previous prime is 3639869. The next prime is 3639913. The reversal of 3639900 is 99363.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2749 + ... + 3851.

It is an arithmetic number, because the mean of its divisors is an integer number (159712).

Almost surely, 2^3639900 is an apocalyptic number.

3639900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3639900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5749632).

3639900 is an abundant number, since it is smaller than the sum of its proper divisors (7859364).

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

3639900 is a wasteful number, since it uses less digits than its factorization.

3639900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 3639900 is about 1907.8521955330. The cubic root of 3639900 is about 153.8260249306.

The spelling of 3639900 in words is "three million, six hundred thirty-nine thousand, nine hundred".