28489598091 has 12 divisors (see below), whose sum is σ = 41715363768. Its totient is φ = 18732885984.

The previous prime is 28489598041. The next prime is 28489598101. The reversal of 28489598091 is 19089598482.

28489598091 is a `hidden beast` number, since 28 + 489 + 59 + 80 + 9 + 1 = 666.

It is not a de Polignac number, because 28489598091 - 2¹¹ = 28489596043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28489598041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21680925 + ... + 21682238.

It is an arithmetic number, because the mean of its divisors is an integer number (3476280314).

Almost surely, 2^28489598091 is an apocalyptic number.

28489598091 is a deficient number, since it is larger than the sum of its proper divisors (13225765677).

28489598091 is a wasteful number, since it uses less digits than its factorization.

28489598091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43363242 (or 43363239 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 63.

The spelling of 28489598091 in words is "twenty-eight billion, four hundred eighty-nine million, five hundred ninety-eight thousand, ninety-one".