18432072 has 48 divisors (see below), whose sum is σ = 50778000. Its totient is φ = 6038496.

The previous prime is 18432049. The next prime is 18432103. The reversal of 18432072 is 27023481.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2079 + ... + 6417.

It is an arithmetic number, because the mean of its divisors is an integer number (1057875).

Almost surely, 2^18432072 is an apocalyptic number.

18432072 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 18432072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25389000).

18432072 is an abundant number, since it is smaller than the sum of its proper divisors (32345928).

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

18432072 is a wasteful number, since it uses less digits than its factorization.

18432072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410 (or 4403 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18432072 is about 4293.2589020463. The cubic root of 18432072 is about 264.1545238619.

The spelling of 18432072 in words is "eighteen million, four hundred thirty-two thousand, seventy-two".