28722549288 has 32 divisors (see below), whose sum is σ = 74122709760. Its totient is φ = 9265338240.

The previous prime is 28722549283. The next prime is 28722549347. The reversal of 28722549288 is 88294522782.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28722549283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19302045 + ... + 19303532.

It is an arithmetic number, because the mean of its divisors is an integer number (2316334680).

Almost surely, 2^28722549288 is an apocalyptic number.

It is an amenable number.

28722549288 is an abundant number, since it is smaller than the sum of its proper divisors (45400160472).

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

28722549288 is a wasteful number, since it uses less digits than its factorization.

28722549288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38605617 (or 38605613 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 57.

The spelling of 28722549288 in words is "twenty-eight billion, seven hundred twenty-two million, five hundred forty-nine thousand, two hundred eighty-eight".