28259026490 has 16 divisors (see below), whose sum is σ = 51390643752. Its totient is φ = 11187078144.

The previous prime is 28259026463. The next prime is 28259026529. The reversal of 28259026490 is 9462095282.

It can be written as a sum of positive squares in 4 ways, for example, as 19692228241 + 8566798249 = 140329^2 + 92557^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14565539 + ... + 14567478.

Almost surely, 2^28259026490 is an apocalyptic number.

28259026490 is a deficient number, since it is larger than the sum of its proper divisors (23131617262).

28259026490 is a wasteful number, since it uses less digits than its factorization.

28259026490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29133121.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 28259026490 in words is "twenty-eight billion, two hundred fifty-nine million, twenty-six thousand, four hundred ninety".