18966288 has 80 divisors (see below), whose sum is σ = 56621376. Its totient is φ = 5406720.

The previous prime is 18966287. The next prime is 18966341. The reversal of 18966288 is 88266981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (18966281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7920 + ... + 10032.

Almost surely, 2^18966288 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 18966288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28310688).

18966288 is an abundant number, since it is smaller than the sum of its proper divisors (37655088).

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

18966288 is a wasteful number, since it uses less digits than its factorization.

18966288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152 (or 2146 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 18966288 is about 4355.0301950733. The cubic root of 18966288 is about 266.6822518669.

The spelling of 18966288 in words is "eighteen million, nine hundred sixty-six thousand, two hundred eighty-eight".