3928270091 has 8 divisors (see below), whose sum is σ = 3999428160. Its totient is φ = 3857264712.

The previous prime is 3928270051. The next prime is 3928270111. The reversal of 3928270091 is 1900728293.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3928270091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3928270001) 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, 14396 + ... + 89798.

It is an arithmetic number, because the mean of its divisors is an integer number (499928520).

Almost surely, 2^3928270091 is an apocalyptic number.

3928270091 is a deficient number, since it is larger than the sum of its proper divisors (71158069).

3928270091 is an equidigital number, since it uses as much as digits as its factorization.

3928270091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76345.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 3928270091 is about 62675.9131644685. The cubic root of 3928270091 is about 1577.8550838159.

The spelling of 3928270091 in words is "three billion, nine hundred twenty-eight million, two hundred seventy thousand, ninety-one".