28100751885 has 48 divisors (see below), whose sum is σ = 51736282416. Its totient is φ = 14060857344.

The previous prime is 28100751863. The next prime is 28100751923. The reversal of 28100751885 is 58815700182.

28100751885 is a `hidden beast` number, since 28 + 100 + 7 + 518 + 8 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 5399604324 + 22701147561 = 73482^2 + 150669^2 .

It is not a de Polignac number, because 28100751885 - 2⁹ = 28100751373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28100751885.

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 47 ways as a sum of consecutive naturals, for example, 184567 + ... + 300443.

It is an arithmetic number, because the mean of its divisors is an integer number (1077839217).

Almost surely, 2^28100751885 is an apocalyptic number.

It is an amenable number.

28100751885 is a deficient number, since it is larger than the sum of its proper divisors (23635530531).

28100751885 is a wasteful number, since it uses less digits than its factorization.

28100751885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116222 (or 116219 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 45.

The spelling of 28100751885 in words is "twenty-eight billion, one hundred million, seven hundred fifty-one thousand, eight hundred eighty-five".