28497157986 has 16 divisors (see below), whose sum is σ = 62175617568. Its totient is φ = 8635502400.

The previous prime is 28497157981. The next prime is 28497158059. The reversal of 28497157986 is 68975179482.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 431775121 = 28497157986 / (2 + 8 + 4 + 9 + 7 + 1 + 5 + 7 + 9 + 8 + 6).

It is not an unprimeable number, because it can be changed into a prime (28497157981) 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, 215887495 + ... + 215887626.

It is an arithmetic number, because the mean of its divisors is an integer number (3885976098).

Almost surely, 2^28497157986 is an apocalyptic number.

28497157986 is an abundant number, since it is smaller than the sum of its proper divisors (33678459582).

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

28497157986 is a wasteful number, since it uses less digits than its factorization.

28497157986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431775137.

The product of its digits is 60963840, while the sum is 66.

The spelling of 28497157986 in words is "twenty-eight billion, four hundred ninety-seven million, one hundred fifty-seven thousand, nine hundred eighty-six".