3920017728 has 56 divisors (see below), whose sum is σ = 11314602720. Its totient is φ = 1187883520.

The previous prime is 3920017711. The next prime is 3920017733. The reversal of 3920017728 is 8277100293.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925923 + ... + 930146.

Almost surely, 2^3920017728 is an apocalyptic number.

It is an amenable number.

3920017728 is an abundant number, since it is smaller than the sum of its proper divisors (7394584992).

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

3920017728 is a wasteful number, since it uses less digits than its factorization.

3920017728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856095 (or 1856085 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 3920017728 is about 62610.0449448808. The cubic root of 3920017728 is about 1576.7494095368.

The spelling of 3920017728 in words is "three billion, nine hundred twenty million, seventeen thousand, seven hundred twenty-eight".