18285372 has 144 divisors (see below), whose sum is σ = 58033920. Its totient is φ = 4875552.

The previous prime is 18285367. The next prime is 18285383. The reversal of 18285372 is 27358281.

18285372 is a `hidden beast` number, since 1 + 8 + 285 + 372 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 272883 + ... + 272949.

Almost surely, 2^18285372 is an apocalyptic number.

18285372 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 18285372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29016960).

18285372 is an abundant number, since it is smaller than the sum of its proper divisors (39748548).

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

18285372 is a wasteful number, since it uses less digits than its factorization.

18285372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 98 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 18285372 is about 4276.1398480405. The cubic root of 18285372 is about 263.4518585530.

It can be divided in two parts, 18 and 285372, that added together give a triangular number (285390 = T₇₅₅).

The spelling of 18285372 in words is "eighteen million, two hundred eighty-five thousand, three hundred seventy-two".