28831120 has 40 divisors (see below), whose sum is σ = 67406400. Its totient is φ = 11468160.

The previous prime is 28831097. The next prime is 28831123. The reversal of 28831120 is 2113882.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (28831123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15015 + ... + 16825.

It is an arithmetic number, because the mean of its divisors is an integer number (1685160).

Almost surely, 2^28831120 is an apocalyptic number.

28831120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28831120 is an abundant number, since it is smaller than the sum of its proper divisors (38575280).

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

28831120 is a wasteful number, since it uses less digits than its factorization.

28831120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 28831120 is about 5369.4617979831. The cubic root of 28831120 is about 306.6341385368.

The spelling of 28831120 in words is "twenty-eight million, eight hundred thirty-one thousand, one hundred twenty".