28831104 has 96 divisors (see below), whose sum is σ = 85924800. Its totient is φ = 9268224.

The previous prime is 28831097. The next prime is 28831123. The reversal of 28831104 is 40113882.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 32977 + ... + 33839.

It is an arithmetic number, because the mean of its divisors is an integer number (895050).

Almost surely, 2^28831104 is an apocalyptic number.

28831104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28831104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42962400).

28831104 is an abundant number, since it is smaller than the sum of its proper divisors (57093696).

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

28831104 is a wasteful number, since it uses less digits than its factorization.

28831104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28831104 is about 5369.4603080757. The cubic root of 28831104 is about 306.6340818140.

Adding to 28831104 its reverse (40113882), we get a palindrome (68944986).

The spelling of 28831104 in words is "twenty-eight million, eight hundred thirty-one thousand, one hundred four".