18228755 has 8 divisors (see below), whose sum is σ = 21969792. Its totient is φ = 14519488.

The previous prime is 18228703. The next prime is 18228797. The reversal of 18228755 is 55782281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18228755 - 2⁸ = 18228499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6659 + ... + 8988.

It is an arithmetic number, because the mean of its divisors is an integer number (2746224).

Almost surely, 2^18228755 is an apocalyptic number.

18228755 is a deficient number, since it is larger than the sum of its proper divisors (3741037).

18228755 is a wasteful number, since it uses less digits than its factorization.

18228755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15885.

The product of its digits is 44800, while the sum is 38.

The square root of 18228755 is about 4269.5146094140. The cubic root of 18228755 is about 263.1796687562.

The spelling of 18228755 in words is "eighteen million, two hundred twenty-eight thousand, seven hundred fifty-five".