28345991112 has 48 divisors (see below), whose sum is σ = 76792847040. Its totient is φ = 9445900128.

The previous prime is 28345991087. The next prime is 28345991123. The reversal of 28345991112 is 21119954382.

28345991112 is a `hidden beast` number, since 2 + 8 + 34 + 599 + 11 + 12 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198133 + ... + 309755.

It is an arithmetic number, because the mean of its divisors is an integer number (1599850980).

Almost surely, 2^28345991112 is an apocalyptic number.

It is an amenable number.

28345991112 is an abundant number, since it is smaller than the sum of its proper divisors (48446855928).

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

28345991112 is a wasteful number, since it uses less digits than its factorization.

28345991112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115162 (or 115155 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The spelling of 28345991112 in words is "twenty-eight billion, three hundred forty-five million, nine hundred ninety-one thousand, one hundred twelve".