28331084 has 24 divisors (see below), whose sum is σ = 51173808. Its totient is φ = 13717440.

The previous prime is 28331053. The next prime is 28331087. The reversal of 28331084 is 48013382.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28331087) 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, 15482 + ... + 17214.

It is an arithmetic number, because the mean of its divisors is an integer number (2132242).

Almost surely, 2^28331084 is an apocalyptic number.

It is an amenable number.

28331084 is a deficient number, since it is larger than the sum of its proper divisors (22842724).

28331084 is a wasteful number, since it uses less digits than its factorization.

28331084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865 (or 1863 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28331084 is about 5322.6951819543. The cubic root of 28331084 is about 304.8510748358.

The spelling of 28331084 in words is "twenty-eight million, three hundred thirty-one thousand, eighty-four".