28379391552 has 224 divisors, whose sum is σ = 85090406400. Its totient is φ = 9273470976.

The previous prime is 28379391511. The next prime is 28379391617. The reversal of 28379391552 is 25519397382.

28379391552 is a `hidden beast` number, since 2 + 83 + 7 + 9 + 3 + 9 + 1 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 19530858 + ... + 19532310.

Almost surely, 2^28379391552 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 28379391552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42545203200).

28379391552 is an abundant number, since it is smaller than the sum of its proper divisors (56711014848).

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

28379391552 is a wasteful number, since it uses less digits than its factorization.

28379391552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690 (or 1674 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The spelling of 28379391552 in words is "twenty-eight billion, three hundred seventy-nine million, three hundred ninety-one thousand, five hundred fifty-two".