18162240 has 56 divisors (see below), whose sum is σ = 57668160. Its totient is φ = 4843008.

The previous prime is 18162217. The next prime is 18162259. The reversal of 18162240 is 4226181.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 18162240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8500 + ... + 10419.

Almost surely, 2^18162240 is an apocalyptic number.

18162240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18162240 is an abundant number, since it is smaller than the sum of its proper divisors (39505920).

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

18162240 is a wasteful number, since it uses less digits than its factorization.

18162240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18939 (or 18929 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18162240 is about 4261.7179634509. The cubic root of 18162240 is about 262.8591727271.

The spelling of 18162240 in words is "eighteen million, one hundred sixty-two thousand, two hundred forty".