28407931776 has 384 divisors, whose sum is σ = 101531289600. Its totient is φ = 7440076800.

The previous prime is 28407931759. The next prime is 28407931801. The reversal of 28407931776 is 67713970482.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4746706 + ... + 4752686.

It is an arithmetic number, because the mean of its divisors is an integer number (264404400).

Almost surely, 2^28407931776 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 28407931776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50765644800).

28407931776 is an abundant number, since it is smaller than the sum of its proper divisors (73123357824).

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

28407931776 is a wasteful number, since it uses less digits than its factorization.

28407931776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6058 (or 6043 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 28407931776 in words is "twenty-eight billion, four hundred seven million, nine hundred thirty-one thousand, seven hundred seventy-six".