18228810 has 16 divisors (see below), whose sum is σ = 43749216. Its totient is φ = 4861008.

The previous prime is 18228797. The next prime is 18228829. The reversal of 18228810 is 1882281.

It is a super-2 number, since 2×18228810² = 664579028032200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 607627 = 18228810 / (1 + 8 + 2 + 2 + 8 + 8 + 1 + 0).

It is a Curzon 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, 303784 + ... + 303843.

It is an arithmetic number, because the mean of its divisors is an integer number (2734326).

Almost surely, 2^18228810 is an apocalyptic number.

18228810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18228810 is an abundant number, since it is smaller than the sum of its proper divisors (25520406).

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

18228810 is a wasteful number, since it uses less digits than its factorization.

18228810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607637.

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 18228810 is about 4269.5210504224. The cubic root of 18228810 is about 263.1799334455.

The spelling of 18228810 in words is "eighteen million, two hundred twenty-eight thousand, eight hundred ten".