18162280 has 64 divisors (see below), whose sum is σ = 42900480. Its totient is φ = 6912000.

The previous prime is 18162269. The next prime is 18162281. The reversal of 18162280 is 8226181.

It is not an unprimeable number, because it can be changed into a prime (18162281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120205 + ... + 120355.

It is an arithmetic number, because the mean of its divisors is an integer number (670320).

Almost surely, 2^18162280 is an apocalyptic number.

18162280 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 18162280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21450240).

18162280 is an abundant number, since it is smaller than the sum of its proper divisors (24738200).

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

18162280 is a wasteful number, since it uses less digits than its factorization.

18162280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 18162280 is about 4261.7226563914. The cubic root of 18162280 is about 262.8593656982.

It can be divided in two parts, 1816 and 2280, that added together give a 12-th power (4096 = 2¹²).

The spelling of 18162280 in words is "eighteen million, one hundred sixty-two thousand, two hundred eighty".