28031112 has 48 divisors (see below), whose sum is σ = 79223040. Its totient is φ = 8936928.

The previous prime is 28031083. The next prime is 28031131. The reversal of 28031112 is 21113082.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6808 + ... + 10119.

It is an arithmetic number, because the mean of its divisors is an integer number (1650480).

Almost surely, 2^28031112 is an apocalyptic number.

It is an amenable number.

28031112 is an abundant number, since it is smaller than the sum of its proper divisors (51191928).

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

28031112 is a wasteful number, since it uses less digits than its factorization.

28031112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16962 (or 16955 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 28031112 is about 5294.4416136171. The cubic root of 28031112 is about 303.7713250283.

Adding to 28031112 its reverse (21113082), we get a palindrome (49144194).

The spelling of 28031112 in words is "twenty-eight million, thirty-one thousand, one hundred twelve".