28115681200 has 60 divisors (see below), whose sum is σ = 71521348680. Its totient is φ = 10584724480.

The previous prime is 28115681179. The next prime is 28115681213. The reversal of 28115681200 is 218651182.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 2060530 + ... + 2074129.

It is an arithmetic number, because the mean of its divisors is an integer number (1192022478).

Almost surely, 2^28115681200 is an apocalyptic number.

28115681200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28115681200 is an abundant number, since it is smaller than the sum of its proper divisors (43405667480).

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

28115681200 is a wasteful number, since it uses less digits than its factorization.

28115681200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134694 (or 4134683 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 34.

The spelling of 28115681200 in words is "twenty-eight billion, one hundred fifteen million, six hundred eighty-one thousand, two hundred".