28680502925 has 6 divisors (see below), whose sum is σ = 35563823658. Its totient is φ = 22944402320.

The previous prime is 28680502913. The next prime is 28680502933. The reversal of 28680502925 is 52920508682.

It can be written as a sum of positive squares in 3 ways, for example, as 6061245316 + 22619257609 = 77854^2 + 150397^2 .

It is not a de Polignac number, because 28680502925 - 2⁴ = 28680502909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28680502925.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 573610034 + ... + 573610083.

It is an arithmetic number, because the mean of its divisors is an integer number (5927303943).

Almost surely, 2^28680502925 is an apocalyptic number.

28680502925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28680502925 is a deficient number, since it is larger than the sum of its proper divisors (6883320733).

28680502925 is a wasteful number, since it uses less digits than its factorization.

28680502925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147220127 (or 1147220122 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 28680502925 in words is "twenty-eight billion, six hundred eighty million, five hundred two thousand, nine hundred twenty-five".