18287072 has 12 divisors (see below), whose sum is σ = 36002736. Its totient is φ = 9143520.

The previous prime is 18287057. The next prime is 18287077. The reversal of 18287072 is 27078281.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18287077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285704 + ... + 285767.

It is an arithmetic number, because the mean of its divisors is an integer number (3000228).

Almost surely, 2^18287072 is an apocalyptic number.

It is an amenable number.

18287072 is a deficient number, since it is larger than the sum of its proper divisors (17715664).

18287072 is an equidigital number, since it uses as much as digits as its factorization.

18287072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571481 (or 571473 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 18287072 is about 4276.3386208297. The cubic root of 18287072 is about 263.4600227161.

The spelling of 18287072 in words is "eighteen million, two hundred eighty-seven thousand, seventy-two".