28594190645 has 18 divisors (see below), whose sum is σ = 35080429122. Its totient is φ = 22374728256.

The previous prime is 28594190591. The next prime is 28594190659. The reversal of 28594190645 is 54609149582.

It can be written as a sum of positive squares in 3 ways, for example, as 19119699076 + 9474491569 = 138274^2 + 97337^2 .

It is not a de Polignac number, because 28594190645 - 2⁸ = 28594190389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 17770601 + ... + 17772209.

It is an arithmetic number, because the mean of its divisors is an integer number (1948912729).

Almost surely, 2^28594190645 is an apocalyptic number.

It is an amenable number.

28594190645 is a deficient number, since it is larger than the sum of its proper divisors (6486238477).

28594190645 is an frugal number, since it uses more digits than its factorization.

28594190645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 28594190645 in words is "twenty-eight billion, five hundred ninety-four million, one hundred ninety thousand, six hundred forty-five".