18608138 has 8 divisors (see below), whose sum is σ = 28294788. Its totient is φ = 9176544.

The previous prime is 18608131. The next prime is 18608159. The reversal of 18608138 is 83180681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15499969 + 3108169 = 3937^2 + 1763^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 18608098 and 18608107.

It is not an unprimeable number, because it can be changed into a prime (18608131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63581 + ... + 63872.

Almost surely, 2^18608138 is an apocalyptic number.

18608138 is a deficient number, since it is larger than the sum of its proper divisors (9686650).

18608138 is a wasteful number, since it uses less digits than its factorization.

18608138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127528.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 18608138 is about 4313.7151041764. The cubic root of 18608138 is about 264.9929415469.

The spelling of 18608138 in words is "eighteen million, six hundred eight thousand, one hundred thirty-eight".