18845728 has 48 divisors (see below), whose sum is σ = 41598144. Its totient is φ = 8328960.

The previous prime is 18845719. The next prime is 18845747. The reversal of 18845728 is 82754881.

It is a super-2 number, since 2×18845728² = 710322927699968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12301 + ... + 13747.

It is an arithmetic number, because the mean of its divisors is an integer number (866628).

Almost surely, 2^18845728 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 18845728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20799072).

18845728 is an abundant number, since it is smaller than the sum of its proper divisors (22752416).

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

18845728 is a wasteful number, since it uses less digits than its factorization.

18845728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505 (or 1497 counting only the distinct ones).

The product of its digits is 143360, while the sum is 43.

The square root of 18845728 is about 4341.1666634673. The cubic root of 18845728 is about 266.1159913983.

The spelling of 18845728 in words is "eighteen million, eight hundred forty-five thousand, seven hundred twenty-eight".