18056280 has 64 divisors (see below), whose sum is σ = 59097600. Its totient is φ = 4376960.

The previous prime is 18056279. The next prime is 18056281. The reversal of 18056280 is 8265081.

It is an interprime number because it is at equal distance from previous prime (18056279) and next prime (18056281).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18056281) 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, 5520 + ... + 8159.

It is an arithmetic number, because the mean of its divisors is an integer number (923400).

Almost surely, 2^18056280 is an apocalyptic number.

18056280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18056280 is an abundant number, since it is smaller than the sum of its proper divisors (41041320).

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

18056280 is a wasteful number, since it uses less digits than its factorization.

18056280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13704 (or 13700 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 18056280 is about 4249.2681722857. The cubic root of 18056280 is about 262.3469947343.

It can be divided in two parts, 18056 and 280, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 18056280 in words is "eighteen million, fifty-six thousand, two hundred eighty".