28985599800 has 72 divisors (see below), whose sum is σ = 97343312040. Its totient is φ = 7729492800.

The previous prime is 28985599781. The next prime is 28985599807. The reversal of 28985599800 is 899558982.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28985599807) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8049756 + ... + 8053355.

It is an arithmetic number, because the mean of its divisors is an integer number (1351990445).

Almost surely, 2^28985599800 is an apocalyptic number.

28985599800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28985599800 is an abundant number, since it is smaller than the sum of its proper divisors (68357712240).

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

28985599800 is a wasteful number, since it uses less digits than its factorization.

28985599800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16103133 (or 16103121 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 63.

The spelling of 28985599800 in words is "twenty-eight billion, nine hundred eighty-five million, five hundred ninety-nine thousand, eight hundred".