3639768 has 64 divisors (see below), whose sum is σ = 10523520. Its totient is φ = 1036800.

The previous prime is 3639763. The next prime is 3639781. The reversal of 3639768 is 8679363.

It is a super-2 number, since 2×3639768² = 26495822187648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639763) 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, 4083 + ... + 4893.

It is an arithmetic number, because the mean of its divisors is an integer number (164430).

Almost surely, 2^3639768 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 3639768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5261760).

3639768 is an abundant number, since it is smaller than the sum of its proper divisors (6883752).

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

3639768 is a wasteful number, since it uses less digits than its factorization.

3639768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 844 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 3639768 is about 1907.8176013445. The cubic root of 3639768 is about 153.8241654216.

The spelling of 3639768 in words is "three million, six hundred thirty-nine thousand, seven hundred sixty-eight".