28023084 has 30 divisors (see below), whose sum is σ = 73258724. Its totient is φ = 9340920.

The previous prime is 28023071. The next prime is 28023091. The reversal of 28023084 is 48032082.

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

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 9 ways as a sum of consecutive naturals, for example, 42922 + ... + 43569.

Almost surely, 2^28023084 is an apocalyptic number.

It is an amenable number.

28023084 is an abundant number, since it is smaller than the sum of its proper divisors (45235640).

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

28023084 is a wasteful number, since it uses less digits than its factorization.

28023084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86507 (or 86496 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28023084 is about 5293.6834057204. The cubic root of 28023084 is about 303.7423226226.

It can be divided in two parts, 2802 and 3084, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 28023084 in words is "twenty-eight million, twenty-three thousand, eighty-four".