18072284 has 12 divisors (see below), whose sum is σ = 31837008. Its totient is φ = 8976000.

The previous prime is 18072281. The next prime is 18072289. The reversal of 18072284 is 48227081.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18072284.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14357 + ... + 15564.

It is an arithmetic number, because the mean of its divisors is an integer number (2653084).

Almost surely, 2^18072284 is an apocalyptic number.

It is an amenable number.

18072284 is a deficient number, since it is larger than the sum of its proper divisors (13764724).

18072284 is a wasteful number, since it uses less digits than its factorization.

18072284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30076 (or 30074 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18072284 is about 4251.1509029909. The cubic root of 18072284 is about 262.4244813751.

The spelling of 18072284 in words is "eighteen million, seventy-two thousand, two hundred eighty-four".