28857148322 has 18 divisors (see below), whose sum is σ = 43713294417. Its totient is φ = 14287434336.

The previous prime is 28857148319. The next prime is 28857148337. The reversal of 28857148322 is 22384175882.

It can be written as a sum of positive squares in 2 ways, for example, as 18225270001 + 10631878321 = 135001^2 + 103111^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=120119.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27146363 + ... + 27147425.

Almost surely, 2^28857148322 is an apocalyptic number.

28857148322 is a deficient number, since it is larger than the sum of its proper divisors (14856146095).

28857148322 is an frugal number, since it uses more digits than its factorization.

28857148322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354 (or 1178 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 50.

Multiplying 28857148322 by its sum of digits (50), we get a square (1442857416100 = 1201190²).

The spelling of 28857148322 in words is "twenty-eight billion, eight hundred fifty-seven million, one hundred forty-eight thousand, three hundred twenty-two".