78608138 has 32 divisors (see below), whose sum is σ = 138741120. Its totient is φ = 32708160.

The previous prime is 78608137. The next prime is 78608191. The reversal of 78608138 is 83180687.

It is a junction number, because it is equal to n+sod(n) for n = 78608095 and 78608104.

It is not an unprimeable number, because it can be changed into a prime (78608137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70328 + ... + 71436.

It is an arithmetic number, because the mean of its divisors is an integer number (4335660).

Almost surely, 2^78608138 is an apocalyptic number.

78608138 is a deficient number, since it is larger than the sum of its proper divisors (60132982).

78608138 is a wasteful number, since it uses less digits than its factorization.

78608138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 78608138 is about 8866.1230535110. The cubic root of 78608138 is about 428.3734076404.

The spelling of 78608138 in words is "seventy-eight million, six hundred eight thousand, one hundred thirty-eight".