78110138 has 32 divisors (see below), whose sum is σ = 127370880. Its totient is φ = 35791360.

The previous prime is 78110129. The next prime is 78110161. The reversal of 78110138 is 83101187.

It is a super-2 number, since 2×78110138² = 12202387316758088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78110138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251003 + ... + 251313.

It is an arithmetic number, because the mean of its divisors is an integer number (3980340).

Almost surely, 2^78110138 is an apocalyptic number.

78110138 is a deficient number, since it is larger than the sum of its proper divisors (49260742).

78110138 is a wasteful number, since it uses less digits than its factorization.

78110138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 78110138 is about 8837.9940031661. The cubic root of 78110138 is about 427.4668770434.

The spelling of 78110138 in words is "seventy-eight million, one hundred ten thousand, one hundred thirty-eight".