18058284 has 72 divisors (see below), whose sum is σ = 50909040. Its totient is φ = 5363712.

The previous prime is 18058279. The next prime is 18058291. The reversal of 18058284 is 48285081.

It is a super-2 number, since 2×18058284² = 652203242049312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10852 + ... + 12404.

It is an arithmetic number, because the mean of its divisors is an integer number (707070).

Almost surely, 2^18058284 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 18058284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25454520).

18058284 is an abundant number, since it is smaller than the sum of its proper divisors (32850756).

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

18058284 is a wasteful number, since it uses less digits than its factorization.

18058284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 18058284 is about 4249.5039710536. The cubic root of 18058284 is about 262.3567000174.

The spelling of 18058284 in words is "eighteen million, fifty-eight thousand, two hundred eighty-four".