28081998590 has 64 divisors (see below), whose sum is σ = 55072509120. Its totient is φ = 10269542400.

The previous prime is 28081998563. The next prime is 28081998599. The reversal of 28081998590 is 9589918082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081998599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 894581 + ... + 925439.

It is an arithmetic number, because the mean of its divisors is an integer number (860507955).

Almost surely, 2^28081998590 is an apocalyptic number.

28081998590 is a deficient number, since it is larger than the sum of its proper divisors (26990510530).

28081998590 is a wasteful number, since it uses less digits than its factorization.

28081998590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31037.

The product of its (nonzero) digits is 3732480, while the sum is 59.

The spelling of 28081998590 in words is "twenty-eight billion, eighty-one million, nine hundred ninety-eight thousand, five hundred ninety".