3906728 has 16 divisors (see below), whose sum is σ = 8371680. Its totient is φ = 1674288.

The previous prime is 3906709. The next prime is 3906731. The reversal of 3906728 is 8276093.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34826 + ... + 34937.

It is an arithmetic number, because the mean of its divisors is an integer number (523230).

Almost surely, 2^3906728 is an apocalyptic number.

It is an amenable number.

3906728 is an abundant number, since it is smaller than the sum of its proper divisors (4464952).

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

3906728 is a wasteful number, since it uses less digits than its factorization.

3906728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69776 (or 69772 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 3906728 is about 1976.5444594038. The cubic root of 3906728 is about 157.4965548923.

The spelling of 3906728 in words is "three million, nine hundred six thousand, seven hundred twenty-eight".