3864725728 has 12 divisors (see below), whose sum is σ = 7608678840. Its totient is φ = 1932362848.

The previous prime is 3864725717. The next prime is 3864725737. The reversal of 3864725728 is 8275274683.

It is a happy number.

It is a super-2 number, since 2×3864725728² = 29872209905330259968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60386308 + ... + 60386371.

It is an arithmetic number, because the mean of its divisors is an integer number (634056570).

Almost surely, 2^3864725728 is an apocalyptic number.

It is an amenable number.

3864725728 is a deficient number, since it is larger than the sum of its proper divisors (3743953112).

3864725728 is a wasteful number, since it uses less digits than its factorization.

3864725728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120772689 (or 120772681 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 52.

The square root of 3864725728 is about 62166.9182765239. The cubic root of 3864725728 is about 1569.3009082758.

The spelling of 3864725728 in words is "three billion, eight hundred sixty-four million, seven hundred twenty-five thousand, seven hundred twenty-eight".