18982238 has 12 divisors (see below), whose sum is σ = 31297560. Its totient is φ = 8628180.

The previous prime is 18982231. The next prime is 18982253. The reversal of 18982238 is 83228981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18982195 and 18982204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18982231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38978 + ... + 39461.

It is an arithmetic number, because the mean of its divisors is an integer number (2608130).

Almost surely, 2^18982238 is an apocalyptic number.

18982238 is a deficient number, since it is larger than the sum of its proper divisors (12315322).

18982238 is a wasteful number, since it uses less digits than its factorization.

18982238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78463 (or 78452 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 18982238 is about 4356.8610260140. The cubic root of 18982238 is about 266.7569878072.

The spelling of 18982238 in words is "eighteen million, nine hundred eighty-two thousand, two hundred thirty-eight".