28396392875 has 16 divisors (see below), whose sum is σ = 35496046560. Its totient is φ = 22680352800.

The previous prime is 28396392851. The next prime is 28396392877. The reversal of 28396392875 is 57829369382.

It is a de Polignac number, because none of the positive numbers 2^k-28396392875 is a prime.

It is a super-2 number, since 2×28396392875² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28396392877) 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, 106124 + ... + 260873.

It is an arithmetic number, because the mean of its divisors is an integer number (2218502910).

Almost surely, 2^28396392875 is an apocalyptic number.

28396392875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28396392875 is a deficient number, since it is larger than the sum of its proper divisors (7099653685).

28396392875 is an equidigital number, since it uses as much as digits as its factorization.

28396392875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367631 (or 367621 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 62.

The spelling of 28396392875 in words is "twenty-eight billion, three hundred ninety-six million, three hundred ninety-two thousand, eight hundred seventy-five".