18385438 has 8 divisors (see below), whose sum is σ = 27597240. Its totient is φ = 9186360.

The previous prime is 18385429. The next prime is 18385459. The reversal of 18385438 is 83458381.

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18385438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2373 + ... + 6511.

It is an arithmetic number, because the mean of its divisors is an integer number (3449655).

Almost surely, 2^18385438 is an apocalyptic number.

18385438 is a deficient number, since it is larger than the sum of its proper divisors (9211802).

18385438 is a wasteful number, since it uses less digits than its factorization.

18385438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6362.

The product of its digits is 92160, while the sum is 40.

The square root of 18385438 is about 4287.8243900608. The cubic root of 18385438 is about 263.9315613077.

The spelling of 18385438 in words is "eighteen million, three hundred eighty-five thousand, four hundred thirty-eight".