28373853231 has 8 divisors (see below), whose sum is σ = 42035338160. Its totient is φ = 18915902136.

The previous prime is 28373853227. The next prime is 28373853251. The reversal of 28373853231 is 13235837382.

28373853231 is a `hidden beast` number, since 2 + 8 + 37 + 385 + 3 + 231 = 666.

It is not a de Polignac number, because 28373853231 - 2² = 28373853227 is a prime.

It is a super-2 number, since 2×28373853231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28373853251) 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 7 ways as a sum of consecutive naturals, for example, 525441700 + ... + 525441753.

It is an arithmetic number, because the mean of its divisors is an integer number (5254417270).

Almost surely, 2^28373853231 is an apocalyptic number.

28373853231 is a deficient number, since it is larger than the sum of its proper divisors (13661484929).

28373853231 is a wasteful number, since it uses less digits than its factorization.

28373853231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050883462 (or 1050883456 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 28373853231 in words is "twenty-eight billion, three hundred seventy-three million, eight hundred fifty-three thousand, two hundred thirty-one".