28325040172 has 72 divisors (see below), whose sum is σ = 61636800960. Its totient is φ = 11259069120.

The previous prime is 28325040169. The next prime is 28325040179. The reversal of 28325040172 is 27104052382.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28325040179) 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, 41043 + ... + 241525.

It is an arithmetic number, because the mean of its divisors is an integer number (856066680).

Almost surely, 2^28325040172 is an apocalyptic number.

28325040172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28325040172 is an abundant number, since it is smaller than the sum of its proper divisors (33311760788).

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

28325040172 is a wasteful number, since it uses less digits than its factorization.

28325040172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200543 (or 200528 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 28325040172 in words is "twenty-eight billion, three hundred twenty-five million, forty thousand, one hundred seventy-two".