3928085091 has 16 divisors (see below), whose sum is σ = 6650726400. Its totient is φ = 2244619944.

The previous prime is 3928085069. The next prime is 3928085101. The reversal of 3928085091 is 1905808293.

It is a happy number.

It is not a de Polignac number, because 3928085091 - 2⁶ = 3928085027 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3928085591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10391571 + ... + 10391948.

It is an arithmetic number, because the mean of its divisors is an integer number (415670400).

Almost surely, 2^3928085091 is an apocalyptic number.

3928085091 is a deficient number, since it is larger than the sum of its proper divisors (2722641309).

3928085091 is a wasteful number, since it uses less digits than its factorization.

3928085091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20783535 (or 20783529 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 3928085091 is about 62674.4373010241. The cubic root of 3928085091 is about 1577.8303139837.

The spelling of 3928085091 in words is "three billion, nine hundred twenty-eight million, eighty-five thousand, ninety-one".