28918172232192 has 80 divisors (see below), whose sum is σ = 77512455804960. Its totient is φ = 9580253294592.

The previous prime is 28918172232151. The next prime is 28918172232217. The reversal of 28918172232192 is 29123227181982.

It is a super-2 number, since 2×28918172232192² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57500967 + ... + 58001702.

It is an arithmetic number, because the mean of its divisors is an integer number (968905697562).

Almost surely, 2^{28918172232192} is an apocalyptic number.

It is an amenable number.

28918172232192 is an abundant number, since it is smaller than the sum of its proper divisors (48594283572768).

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

28918172232192 is a wasteful number, since it uses less digits than its factorization.

28918172232192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115502853 (or 115502837 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 57.

The spelling of 28918172232192 in words is "twenty-eight trillion, nine hundred eighteen billion, one hundred seventy-two million, two hundred thirty-two thousand, one hundred ninety-two".