28999888992 has 36 divisors (see below), whose sum is σ = 82468435140. Its totient is φ = 9666629568.

The previous prime is 28999888933. The next prime is 28999889003. The reversal of 28999888992 is 29988899982.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50346742 + ... + 50347317.

It is an arithmetic number, because the mean of its divisors is an integer number (2290789865).

Almost surely, 2^28999888992 is an apocalyptic number.

It is an amenable number.

28999888992 is an abundant number, since it is smaller than the sum of its proper divisors (53468546148).

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

28999888992 is a wasteful number, since it uses less digits than its factorization.

28999888992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100694075 (or 100694064 counting only the distinct ones).

The product of its digits is 967458816, while the sum is 81.

The spelling of 28999888992 in words is "twenty-eight billion, nine hundred ninety-nine million, eight hundred eighty-eight thousand, nine hundred ninety-two".