18028824 has 64 divisors (see below), whose sum is σ = 50250240. Its totient is φ = 5343360.

The previous prime is 18028783. The next prime is 18028837. The reversal of 18028824 is 42882081.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11682 + ... + 13134.

It is an arithmetic number, because the mean of its divisors is an integer number (785160).

Almost surely, 2^18028824 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 18028824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25125120).

18028824 is an abundant number, since it is smaller than the sum of its proper divisors (32221416).

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

18028824 is a wasteful number, since it uses less digits than its factorization.

18028824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520 (or 1516 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 18028824 is about 4246.0362692751. The cubic root of 18028824 is about 262.2139541692.

The spelling of 18028824 in words is "eighteen million, twenty-eight thousand, eight hundred twenty-four".