28030902705 has 96 divisors (see below), whose sum is σ = 54236101920. Its totient is φ = 13303678464.

The previous prime is 28030902703. The next prime is 28030902733. The reversal of 28030902705 is 50720903082.

It is a happy number.

28030902705 is a `hidden beast` number, since 2 + 80 + 309 + 0 + 270 + 5 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 6929563536 + 21101339169 = 83244^2 + 145263^2 .

It is not a de Polignac number, because 28030902705 - 2¹ = 28030902703 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28030902705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28030902703) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 257164191 + ... + 257164299.

It is an arithmetic number, because the mean of its divisors is an integer number (564959395).

Almost surely, 2^28030902705 is an apocalyptic number.

It is an amenable number.

28030902705 is a deficient number, since it is larger than the sum of its proper divisors (26205199215).

28030902705 is an equidigital number, since it uses as much as digits as its factorization.

28030902705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 28030902705 in words is "twenty-eight billion, thirty million, nine hundred two thousand, seven hundred five".