28104084 has 60 divisors (see below), whose sum is σ = 74156544. Its totient is φ = 9280656.

The previous prime is 28104047. The next prime is 28104107. The reversal of 28104084 is 48040182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40807 + ... + 41489.

Almost surely, 2^28104084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28104084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37078272).

28104084 is an abundant number, since it is smaller than the sum of its proper divisors (46052460).

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

28104084 is a wasteful number, since it uses less digits than its factorization.

28104084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28104084 is about 5301.3285127409. The cubic root of 28104084 is about 304.0346942167.

The spelling of 28104084 in words is "twenty-eight million, one hundred four thousand, eighty-four".