18072386 has 8 divisors (see below), whose sum is σ = 27246780. Its totient is φ = 8990128.

The previous prime is 18072371. The next prime is 18072389. The reversal of 18072386 is 68327081.

It can be written as a sum of positive squares in 2 ways, for example, as 15062161 + 3010225 = 3881^2 + 1735^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18072386² = 653222271465992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18072389) 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, 22541 + ... + 23328.

Almost surely, 2^18072386 is an apocalyptic number.

18072386 is a deficient number, since it is larger than the sum of its proper divisors (9174394).

18072386 is a wasteful number, since it uses less digits than its factorization.

18072386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46068.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 18072386 is about 4251.1628997252. The cubic root of 18072386 is about 262.4249750823.

The spelling of 18072386 in words is "eighteen million, seventy-two thousand, three hundred eighty-six".