28169726235 has 32 divisors (see below), whose sum is σ = 51715625472. Its totient is φ = 12826272000.

The previous prime is 28169726191. The next prime is 28169726237. The reversal of 28169726235 is 53262796182.

It is a happy number.

It is not a de Polignac number, because 28169726235 - 2⁸ = 28169725979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28169726237) 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 31 ways as a sum of consecutive naturals, for example, 508074 + ... + 560783.

It is an arithmetic number, because the mean of its divisors is an integer number (1616113296).

Almost surely, 2^28169726235 is an apocalyptic number.

28169726235 is a deficient number, since it is larger than the sum of its proper divisors (23545899237).

28169726235 is a wasteful number, since it uses less digits than its factorization.

28169726235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069123.

The product of its digits is 2177280, while the sum is 51.

The spelling of 28169726235 in words is "twenty-eight billion, one hundred sixty-nine million, seven hundred twenty-six thousand, two hundred thirty-five".