28117965594 has 16 divisors (see below), whose sum is σ = 59195717280. Its totient is φ = 8879357520.

The previous prime is 28117965593. The next prime is 28117965637. The reversal of 28117965594 is 49556971182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (28117965593) 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, 123324297 + ... + 123324524.

It is an arithmetic number, because the mean of its divisors is an integer number (3699732330).

Almost surely, 2^28117965594 is an apocalyptic number.

28117965594 is an abundant number, since it is smaller than the sum of its proper divisors (31077751686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28117965594 is a wasteful number, since it uses less digits than its factorization.

28117965594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246648845.

The product of its digits is 5443200, while the sum is 57.

The spelling of 28117965594 in words is "twenty-eight billion, one hundred seventeen million, nine hundred sixty-five thousand, five hundred ninety-four".