18488338 has 16 divisors (see below), whose sum is σ = 31230720. Its totient is φ = 8132400.

The previous prime is 18488321. The next prime is 18488339. The reversal of 18488338 is 83388481.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18488294 and 18488303.

It is not an unprimeable number, because it can be changed into a prime (18488339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12873 + ... + 14236.

It is an arithmetic number, because the mean of its divisors is an integer number (1951920).

Almost surely, 2^18488338 is an apocalyptic number.

18488338 is a deficient number, since it is larger than the sum of its proper divisors (12742382).

18488338 is a wasteful number, since it uses less digits than its factorization.

18488338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27153.

The product of its digits is 147456, while the sum is 43.

The square root of 18488338 is about 4299.8067398431. The cubic root of 18488338 is about 264.4230380845.

The spelling of 18488338 in words is "eighteen million, four hundred eighty-eight thousand, three hundred thirty-eight".