18283272 has 64 divisors (see below), whose sum is σ = 53328000. Its totient is φ = 5221440.

The previous prime is 18283267. The next prime is 18283297. The reversal of 18283272 is 27238281.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7122 + ... + 9342.

It is an arithmetic number, because the mean of its divisors is an integer number (833250).

Almost surely, 2^18283272 is an apocalyptic number.

18283272 is a gapful number since it is divisible by the number (12) 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 18283272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26664000).

18283272 is an abundant number, since it is smaller than the sum of its proper divisors (35044728).

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

18283272 is a wasteful number, since it uses less digits than its factorization.

18283272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251 (or 2233 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 18283272 is about 4275.8942924259. The cubic root of 18283272 is about 263.4417727116.

The spelling of 18283272 in words is "eighteen million, two hundred eighty-three thousand, two hundred seventy-two".