28385280000 has 1020 divisors, whose sum is σ = 127753330848. Its totient is φ = 5898240000.

The previous prime is 28385279987. The next prime is 28385280043. The reversal of 28385280000 is 8258382.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2580479995 + ... + 2580480005.

Almost surely, 2^28385280000 is an apocalyptic number.

28385280000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28385280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63876665424).

28385280000 is an abundant number, since it is smaller than the sum of its proper divisors (99368050848).

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

28385280000 is an frugal number, since it uses more digits than its factorization.

28385280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 28385280000 in words is "twenty-eight billion, three hundred eighty-five million, two hundred eighty thousand".