28399855152 has 20 divisors (see below), whose sum is σ = 73366292600. Its totient is φ = 9466618368.

The previous prime is 28399855111. The next prime is 28399855177. The reversal of 28399855152 is 25155899382.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28399855092 and 28399855101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295831777 + ... + 295831872.

It is an arithmetic number, because the mean of its divisors is an integer number (3668314630).

Almost surely, 2^28399855152 is an apocalyptic number.

It is an amenable number.

28399855152 is an abundant number, since it is smaller than the sum of its proper divisors (44966437448).

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

28399855152 is a wasteful number, since it uses less digits than its factorization.

28399855152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591663660 (or 591663654 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 57.

The spelling of 28399855152 in words is "twenty-eight billion, three hundred ninety-nine million, eight hundred fifty-five thousand, one hundred fifty-two".