18828472 has 32 divisors (see below), whose sum is σ = 38253600. Its totient is φ = 8636544.

The previous prime is 18828463. The next prime is 18828479. The reversal of 18828472 is 27482881.

It is a super-2 number, since 2×18828472² = 709022715709568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18828479) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20029 + ... + 20947.

It is an arithmetic number, because the mean of its divisors is an integer number (1195425).

Almost surely, 2^18828472 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 18828472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19126800).

18828472 is an abundant number, since it is smaller than the sum of its proper divisors (19425128).

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

18828472 is a wasteful number, since it uses less digits than its factorization.

18828472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135 (or 1131 counting only the distinct ones).

The product of its digits is 57344, while the sum is 40.

The square root of 18828472 is about 4339.1787241366. The cubic root of 18828472 is about 266.0347439871.

It can be divided in two parts, 188284 and 72, that added together give a square (188356 = 434²).

The spelling of 18828472 in words is "eighteen million, eight hundred twenty-eight thousand, four hundred seventy-two".