3664438728 has 32 divisors (see below), whose sum is σ = 9163059360. Its totient is φ = 1221217920.

The previous prime is 3664438727. The next prime is 3664438747. The reversal of 3664438728 is 8278344663.

It is a super-2 number, since 2×3664438728² = 26856222382532515968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3664438721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121851 + ... + 148917.

It is an arithmetic number, because the mean of its divisors is an integer number (286345605).

Almost surely, 2^3664438728 is an apocalyptic number.

It is an amenable number.

3664438728 is an abundant number, since it is smaller than the sum of its proper divisors (5498620632).

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

3664438728 is a wasteful number, since it uses less digits than its factorization.

3664438728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32717 (or 32713 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 51.

The square root of 3664438728 is about 60534.6076884950. The cubic root of 3664438728 is about 1541.7092855667.

The spelling of 3664438728 in words is "three billion, six hundred sixty-four million, four hundred thirty-eight thousand, seven hundred twenty-eight".