28077654784 has 72 divisors (see below), whose sum is σ = 60156023760. Its totient is φ = 13031866368.

The previous prime is 28077654779. The next prime is 28077654793. The reversal of 28077654784 is 48745677082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273507 + ... + 361885.

It is an arithmetic number, because the mean of its divisors is an integer number (835500330).

Almost surely, 2^28077654784 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 28077654784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30078011880).

28077654784 is an abundant number, since it is smaller than the sum of its proper divisors (32078368976).

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

28077654784 is an equidigital number, since it uses as much as digits as its factorization.

28077654784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88485 (or 88471 counting only the distinct ones).

The product of its (nonzero) digits is 21073920, while the sum is 58.

The spelling of 28077654784 in words is "twenty-eight billion, seventy-seven million, six hundred fifty-four thousand, seven hundred eighty-four".