18227040 has 192 divisors, whose sum is σ = 65028096. Its totient is φ = 4257792.

The previous prime is 18227003. The next prime is 18227081. The reversal of 18227040 is 4072281.

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 18227040.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 143457 + ... + 143583.

It is an arithmetic number, because the mean of its divisors is an integer number (338688).

Almost surely, 2^18227040 is an apocalyptic number.

18227040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18227040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32514048).

18227040 is an abundant number, since it is smaller than the sum of its proper divisors (46801056).

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

18227040 is a wasteful number, since it uses less digits than its factorization.

18227040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 18227040 is about 4269.3137621871. The cubic root of 18227040 is about 263.1714149966.

The spelling of 18227040 in words is "eighteen million, two hundred twenty-seven thousand, forty".