28326560724 has 432 divisors, whose sum is σ = 95457398400. Its totient is φ = 6993907200.

The previous prime is 28326560719. The next prime is 28326560737. The reversal of 28326560724 is 42706562382.

28326560724 is a `hidden beast` number, since 2 + 8 + 32 + 6 + 5 + 607 + 2 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28326560724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 39952482 + ... + 39953190.

It is an arithmetic number, because the mean of its divisors is an integer number (220966200).

Almost surely, 2^28326560724 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28326560724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47728699200).

28326560724 is an abundant number, since it is smaller than the sum of its proper divisors (67130837676).

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

28326560724 is a wasteful number, since it uses less digits than its factorization.

28326560724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 28326560724 in words is "twenty-eight billion, three hundred twenty-six million, five hundred sixty thousand, seven hundred twenty-four".