28650345590 has 24 divisors (see below), whose sum is σ = 51651626832. Its totient is φ = 11442154640.

The previous prime is 28650345571. The next prime is 28650345593. The reversal of 28650345590 is 9554305682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28650345593) 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 11 ways as a sum of consecutive naturals, for example, 17185937 + ... + 17187603.

It is an arithmetic number, because the mean of its divisors is an integer number (2152151118).

Almost surely, 2^28650345590 is an apocalyptic number.

28650345590 is a deficient number, since it is larger than the sum of its proper divisors (23001281242).

28650345590 is an equidigital number, since it uses as much as digits as its factorization.

28650345590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372 (or 2705 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 28650345590 in words is "twenty-eight billion, six hundred fifty million, three hundred forty-five thousand, five hundred ninety".