18285397 has 8 divisors (see below), whose sum is σ = 20111616. Its totient is φ = 16519152.

The previous prime is 18285383. The next prime is 18285401. The reversal of 18285397 is 79358281.

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

It is a de Polignac number, because none of the positive numbers 2^k-18285397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18285307) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14353 + ... + 15574.

It is an arithmetic number, because the mean of its divisors is an integer number (2513952).

Almost surely, 2^18285397 is an apocalyptic number.

It is an amenable number.

18285397 is a deficient number, since it is larger than the sum of its proper divisors (1826219).

18285397 is a wasteful number, since it uses less digits than its factorization.

18285397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29987.

The product of its digits is 120960, while the sum is 43.

The square root of 18285397 is about 4276.1427712367. The cubic root of 18285397 is about 263.4519786179.

It can be divided in two parts, 1828 and 5397, that added together give a square (7225 = 85²).

The spelling of 18285397 in words is "eighteen million, two hundred eighty-five thousand, three hundred ninety-seven".