28489294394 has 24 divisors (see below), whose sum is σ = 47103003360. Its totient is φ = 12913568360.

The previous prime is 28489294391. The next prime is 28489294397. The reversal of 28489294394 is 49349298482.

It is an interprime number because it is at equal distance from previous prime (28489294391) and next prime (28489294397).

It is not an unprimeable number, because it can be changed into a prime (28489294391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77084 + ... + 250839.

It is an arithmetic number, because the mean of its divisors is an integer number (1962625140).

Almost surely, 2^28489294394 is an apocalyptic number.

28489294394 is a deficient number, since it is larger than the sum of its proper divisors (18613708966).

28489294394 is a wasteful number, since it uses less digits than its factorization.

28489294394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328306 (or 328295 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 62.

The spelling of 28489294394 in words is "twenty-eight billion, four hundred eighty-nine million, two hundred ninety-four thousand, three hundred ninety-four".