28489322402 has 30 divisors (see below), whose sum is σ = 44427956295. Its totient is φ = 13701494800.

The previous prime is 28489322401. The next prime is 28489322417. The reversal of 28489322402 is 20422398482.

It can be written as a sum of positive squares in 3 ways, for example, as 3218179441 + 25271142961 = 56729^2 + 158969^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119351.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28489322401) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 401258027 + ... + 401258097.

Almost surely, 2^28489322402 is an apocalyptic number.

28489322402 is a deficient number, since it is larger than the sum of its proper divisors (15938633893).

28489322402 is an frugal number, since it uses more digits than its factorization.

28489322402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 28489322402 in words is "twenty-eight billion, four hundred eighty-nine million, three hundred twenty-two thousand, four hundred two".