28774564752 has 120 divisors (see below), whose sum is σ = 79590747136. Its totient is φ = 8955684864.

The previous prime is 28774564739. The next prime is 28774564757. The reversal of 28774564752 is 25746547782.

It is a junction number, because it is equal to n+sod(n) for n = 28774564692 and 28774564701.

It is not an unprimeable number, because it can be changed into a prime (28774564757) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1753578 + ... + 1769910.

Almost surely, 2^28774564752 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 28774564752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39795373568).

28774564752 is an abundant number, since it is smaller than the sum of its proper divisors (50816182384).

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

28774564752 is a wasteful number, since it uses less digits than its factorization.

28774564752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16505 (or 16482 counting only the distinct ones).

The product of its digits is 26342400, while the sum is 57.

The spelling of 28774564752 in words is "twenty-eight billion, seven hundred seventy-four million, five hundred sixty-four thousand, seven hundred fifty-two".