28685099790 has 48 divisors (see below), whose sum is σ = 75631716576. Its totient is φ = 7541620800.

The previous prime is 28685099783. The next prime is 28685099803. The reversal of 28685099790 is 9799058682.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2238141 + ... + 2250920.

It is an arithmetic number, because the mean of its divisors is an integer number (1575660762).

Almost surely, 2^28685099790 is an apocalyptic number.

28685099790 is an abundant number, since it is smaller than the sum of its proper divisors (46946616786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28685099790 is a wasteful number, since it uses less digits than its factorization.

28685099790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489145 (or 4489142 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 28685099790 in words is "twenty-eight billion, six hundred eighty-five million, ninety-nine thousand, seven hundred ninety".