28622887489 has 9 divisors (see below), whose sum is σ = 33297389667. Its totient is φ = 24532888464.

The previous prime is 28622887463. The next prime is 28622887507. The reversal of 28622887489 is 98478822682.

The square root of 28622887489 is 169183.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 27944805889 + 678081600 = 167167^2 + 26040^2 .

It is not a de Polignac number, because 28622887489 - 2²⁷ = 28488669761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28622887489.

It is not an unprimeable number, because it can be changed into a prime (28622887429) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1172197 + ... + 1196365.

It is an arithmetic number, because the mean of its divisors is an integer number (3699709963).

Almost surely, 2^28622887489 is an apocalyptic number.

28622887489 is the 169183-rd square number.

28622887489 is the 84592-nd centered octagonal number.

It is an amenable number.

28622887489 is a deficient number, since it is larger than the sum of its proper divisors (4674502178).

28622887489 is an frugal number, since it uses more digits than its factorization.

28622887489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48352 (or 24176 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 64.

Multiplying 28622887489 by its sum of digits (64), we get a square (1831864799296 = 1353464²).

The spelling of 28622887489 in words is "twenty-eight billion, six hundred twenty-two million, eight hundred eighty-seven thousand, four hundred eighty-nine".