8278328991 has 16 divisors (see below), whose sum is σ = 11204334080. Its totient is φ = 5435812800.

The previous prime is 8278328941. The next prime is 8278329023. The reversal of 8278328991 is 1998238728.

It is not a de Polignac number, because 8278328991 - 2¹⁴ = 8278312607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8278328941) 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, 136266 + ... + 187416.

It is an arithmetic number, because the mean of its divisors is an integer number (700270880).

Almost surely, 2^8278328991 is an apocalyptic number.

8278328991 is a deficient number, since it is larger than the sum of its proper divisors (2926005089).

8278328991 is a wasteful number, since it uses less digits than its factorization.

8278328991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51966.

The product of its digits is 3483648, while the sum is 57.

The square root of 8278328991 is about 90985.3229427692. The cubic root of 8278328991 is about 2022.9301812658.

The spelling of 8278328991 in words is "eight billion, two hundred seventy-eight million, three hundred twenty-eight thousand, nine hundred ninety-one".