3994728 has 32 divisors (see below), whose sum is σ = 10575360. Its totient is φ = 1253120.

The previous prime is 3994723. The next prime is 3994729. The reversal of 3994728 is 8274993.

It is a self number, because there is not a number n which added to its sum of digits gives 3994728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994723) 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, 4488 + ... + 5303.

It is an arithmetic number, because the mean of its divisors is an integer number (330480).

Almost surely, 2^3994728 is an apocalyptic number.

It is an amenable number.

3994728 is an abundant number, since it is smaller than the sum of its proper divisors (6580632).

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

3994728 is a wasteful number, since it uses less digits than its factorization.

3994728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9817 (or 9813 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 3994728 is about 1998.6815654326. The cubic root of 3994728 is about 158.6703347158.

The spelling of 3994728 in words is "three million, nine hundred ninety-four thousand, seven hundred twenty-eight".