18284397 has 8 divisors (see below), whose sum is σ = 24441600. Its totient is φ = 12158400.

The previous prime is 18284393. The next prime is 18284407. The reversal of 18284397 is 79348281.

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

It is not a de Polignac number, because 18284397 - 2² = 18284393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18284393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6397 + ... + 8802.

It is an arithmetic number, because the mean of its divisors is an integer number (3055200).

Almost surely, 2^18284397 is an apocalyptic number.

It is an amenable number.

18284397 is a deficient number, since it is larger than the sum of its proper divisors (6157203).

18284397 is a wasteful number, since it uses less digits than its factorization.

18284397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15603.

The product of its digits is 96768, while the sum is 42.

The square root of 18284397 is about 4276.0258418302. The cubic root of 18284397 is about 263.4471759370.

It can be divided in two parts, 18284 and 397, that added together give a palindrome (18681).

The spelling of 18284397 in words is "eighteen million, two hundred eighty-four thousand, three hundred ninety-seven".