28423086328 has 128 divisors (see below), whose sum is σ = 70729344000. Its totient is φ = 10392468480.

The previous prime is 28423086311. The next prime is 28423086353. The reversal of 28423086328 is 82368032482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 542053 + ... + 592171.

It is an arithmetic number, because the mean of its divisors is an integer number (552573000).

Almost surely, 2^28423086328 is an apocalyptic number.

28423086328 is a gapful number since it is divisible by the number (28) 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 28423086328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35364672000).

28423086328 is an abundant number, since it is smaller than the sum of its proper divisors (42306257672).

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

28423086328 is a wasteful number, since it uses less digits than its factorization.

28423086328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50205 (or 50201 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 28423086328 in words is "twenty-eight billion, four hundred twenty-three million, eighty-six thousand, three hundred twenty-eight".