3864728 has 24 divisors (see below), whose sum is σ = 8430300. Its totient is φ = 1656144.

The previous prime is 3864719. The next prime is 3864767. The reversal of 3864728 is 8274683.

3864728 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3864728² = 29872245027968, which contains 22 as substring.

3864728 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 3864691 and 3864700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4538 + ... + 5321.

Almost surely, 2^3864728 is an apocalyptic number.

It is an amenable number.

3864728 is an abundant number, since it is smaller than the sum of its proper divisors (4565572).

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

3864728 is a wasteful number, since it uses less digits than its factorization.

3864728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9879 (or 9868 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 3864728 is about 1965.8911465287. The cubic root of 3864728 is about 156.9301215797.

The spelling of 3864728 in words is "three million, eight hundred sixty-four thousand, seven hundred twenty-eight".