28136794169 has 24 divisors (see below), whose sum is σ = 31087271040. Its totient is φ = 25446960000.

The previous prime is 28136794141. The next prime is 28136794187. The reversal of 28136794169 is 96149763182.

It is not a de Polignac number, because 28136794169 - 2⁸ = 28136793913 is a prime.

It is a super-2 number, since 2×28136794169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28136794199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30616292 + ... + 30617210.

It is an arithmetic number, because the mean of its divisors is an integer number (1295302960).

Almost surely, 2^28136794169 is an apocalyptic number.

It is an amenable number.

28136794169 is a deficient number, since it is larger than the sum of its proper divisors (2950476871).

28136794169 is a wasteful number, since it uses less digits than its factorization.

28136794169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1962 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The spelling of 28136794169 in words is "twenty-eight billion, one hundred thirty-six million, seven hundred ninety-four thousand, one hundred sixty-nine".