18198756 has 63 divisors (see below), whose sum is σ = 48361971. Its totient is φ = 5989464.

The previous prime is 18198743. The next prime is 18198757. The reversal of 18198756 is 65789181.

The square root of 18198756 is 4266.

It is a perfect power (a square), and thus also a powerful number.

Its product of digits (120960) is a multiple of the sum of its prime divisors (84).

It is not an unprimeable number, because it can be changed into a prime (18198757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 230325 + ... + 230403.

Almost surely, 2^18198756 is an apocalyptic number.

18198756 is the 4266-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18198756

18198756 is an abundant number, since it is smaller than the sum of its proper divisors (30163215).

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

18198756 is an frugal number, since it uses more digits than its factorization.

18198756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 84 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The cubic root of 18198756 is about 263.0352181919.

The spelling of 18198756 in words is "eighteen million, one hundred ninety-eight thousand, seven hundred fifty-six".