28157837823 has 12 divisors (see below), whose sum is σ = 40675222120. Its totient is φ = 18770604336.

The previous prime is 28157837809. The next prime is 28157837843. The reversal of 28157837823 is 32873875182.

It is not a de Polignac number, because 28157837823 - 2⁹ = 28157837311 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 28157837823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28157837803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42168 + ... + 241026.

Almost surely, 2^28157837823 is an apocalyptic number.

28157837823 is a deficient number, since it is larger than the sum of its proper divisors (12517384297).

28157837823 is a wasteful number, since it uses less digits than its factorization.

28157837823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214598 (or 214595 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 28157837823 in words is "twenty-eight billion, one hundred fifty-seven million, eight hundred thirty-seven thousand, eight hundred twenty-three".