18399282 has 32 divisors (see below), whose sum is σ = 41532480. Its totient is φ = 5382720.

The previous prime is 18399281. The next prime is 18399289. The reversal of 18399282 is 28299381.

It is not an unprimeable number, because it can be changed into a prime (18399281) 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, 2893 + ... + 6720.

It is an arithmetic number, because the mean of its divisors is an integer number (1297890).

Almost surely, 2^18399282 is an apocalyptic number.

18399282 is an abundant number, since it is smaller than the sum of its proper divisors (23133198).

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

18399282 is a wasteful number, since it uses less digits than its factorization.

18399282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9658.

The product of its digits is 62208, while the sum is 42.

The square root of 18399282 is about 4289.4384247824. The cubic root of 18399282 is about 263.9977903855.

Subtracting 18399282 from its reverse (28299381), we obtain a palindrome (9900099).

It can be divided in two parts, 18399 and 282, that added together give a palindrome (18681).

The spelling of 18399282 in words is "eighteen million, three hundred ninety-nine thousand, two hundred eighty-two".