28509790925730 has 32 divisors (see below), whose sum is σ = 68425733352384. Its totient is φ = 7602362565696.

The previous prime is 28509790925723. The next prime is 28509790925741. The reversal of 28509790925730 is 3752909790582.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14587129 + ... + 16425708.

It is an arithmetic number, because the mean of its divisors is an integer number (2138304167262).

Almost surely, 2^{28509790925730} is an apocalyptic number.

28509790925730 is an abundant number, since it is smaller than the sum of its proper divisors (39915942426654).

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

28509790925730 is a wasteful number, since it uses less digits than its factorization.

28509790925730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31043490.

The product of its (nonzero) digits is 85730400, while the sum is 66.

The spelling of 28509790925730 in words is "twenty-eight trillion, five hundred nine billion, seven hundred ninety million, nine hundred twenty-five thousand, seven hundred thirty".