18844028 has 36 divisors (see below), whose sum is σ = 38878560. Its totient is φ = 7967232.

The previous prime is 18844027. The next prime is 18844043. The reversal of 18844028 is 82044881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18844027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14876 + ... + 16092.

It is an arithmetic number, because the mean of its divisors is an integer number (1079960).

Almost surely, 2^18844028 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 18844028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19439280).

18844028 is an abundant number, since it is smaller than the sum of its proper divisors (20034532).

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

18844028 is a wasteful number, since it uses less digits than its factorization.

18844028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 1305 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 18844028 is about 4340.9708591512. The cubic root of 18844028 is about 266.1079893941.

The spelling of 18844028 in words is "eighteen million, eight hundred forty-four thousand, twenty-eight".