18344398 has 8 divisors (see below), whose sum is σ = 27983160. Its totient is φ = 9016680.

The previous prime is 18344393. The next prime is 18344407. The reversal of 18344398 is 89344381.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18344398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18344393) 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, 77613 + ... + 77848.

It is an arithmetic number, because the mean of its divisors is an integer number (3497895).

Almost surely, 2^18344398 is an apocalyptic number.

18344398 is a deficient number, since it is larger than the sum of its proper divisors (9638762).

18344398 is a wasteful number, since it uses less digits than its factorization.

18344398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155522.

The product of its digits is 82944, while the sum is 40.

The square root of 18344398 is about 4283.0360726942. The cubic root of 18344398 is about 263.7350322062.

The spelling of 18344398 in words is "eighteen million, three hundred forty-four thousand, three hundred ninety-eight".