28089018720 has 216 divisors, whose sum is σ = 111503652624. Its totient is φ = 6420331008.

The previous prime is 28089018719. The next prime is 28089018799. The reversal of 28089018720 is 2781098082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 128484 + ... + 269603.

It is an arithmetic number, because the mean of its divisors is an integer number (516220614).

Almost surely, 2^28089018720 is an apocalyptic number.

28089018720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28089018720 is an abundant number, since it is smaller than the sum of its proper divisors (83414633904).

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

28089018720 is a wasteful number, since it uses less digits than its factorization.

28089018720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398122 (or 398104 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 28089018720 in words is "twenty-eight billion, eighty-nine million, eighteen thousand, seven hundred twenty".