18228770 has 16 divisors (see below), whose sum is σ = 37499328. Its totient is φ = 6249840.

The previous prime is 18228703. The next prime is 18228797. The reversal of 18228770 is 7782281.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18228770.

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, 130136 + ... + 130275.

It is an arithmetic number, because the mean of its divisors is an integer number (2343708).

Almost surely, 2^18228770 is an apocalyptic number.

18228770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18228770 is an abundant number, since it is smaller than the sum of its proper divisors (19270558).

18228770 is a wasteful number, since it uses less digits than its factorization.

18228770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260425.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 18228770 is about 4269.5163660537. The cubic root of 18228770 is about 263.1797409443.

The spelling of 18228770 in words is "eighteen million, two hundred twenty-eight thousand, seven hundred seventy".