18058238 has 16 divisors (see below), whose sum is σ = 29709936. Its totient is φ = 8163840.

The previous prime is 18058231. The next prime is 18058279. The reversal of 18058238 is 83285081.

It is a junction number, because it is equal to n+sod(n) for n = 18058198 and 18058207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18058231) 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, 2120 + ... + 6372.

It is an arithmetic number, because the mean of its divisors is an integer number (1856871).

Almost surely, 2^18058238 is an apocalyptic number.

18058238 is a deficient number, since it is larger than the sum of its proper divisors (11651698).

18058238 is a wasteful number, since it uses less digits than its factorization.

18058238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4459.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 18058238 is about 4249.4985586537. The cubic root of 18058238 is about 262.3564772495.

The spelling of 18058238 in words is "eighteen million, fifty-eight thousand, two hundred thirty-eight".