3904728 has 32 divisors (see below), whose sum is σ = 10276800. Its totient is φ = 1232928.

The previous prime is 3904727. The next prime is 3904741. The reversal of 3904728 is 8274093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3904727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3826 + ... + 4737.

It is an arithmetic number, because the mean of its divisors is an integer number (321150).

Almost surely, 2^3904728 is an apocalyptic number.

3904728 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3904728 is an abundant number, since it is smaller than the sum of its proper divisors (6372072).

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

3904728 is a wasteful number, since it uses less digits than its factorization.

3904728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8591 (or 8587 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 3904728 is about 1976.0384611642. The cubic root of 3904728 is about 157.4696741814.

The spelling of 3904728 in words is "three million, nine hundred four thousand, seven hundred twenty-eight".