28117036123 has 16 divisors (see below), whose sum is σ = 31394601216. Its totient is φ = 24960025440.

The previous prime is 28117036091. The next prime is 28117036127. The reversal of 28117036123 is 32163071182.

It is a cyclic number.

It is not a de Polignac number, because 28117036123 - 2⁵ = 28117036091 is a prime.

It is a super-2 number, since 2×28117036123² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28117036127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3639661 + ... + 3647377.

It is an arithmetic number, because the mean of its divisors is an integer number (1962162576).

Almost surely, 2^28117036123 is an apocalyptic number.

28117036123 is a deficient number, since it is larger than the sum of its proper divisors (3277565093).

28117036123 is a wasteful number, since it uses less digits than its factorization.

28117036123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15474.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 28117036123 in words is "twenty-eight billion, one hundred seventeen million, thirty-six thousand, one hundred twenty-three".