138751078 has 8 divisors (see below), whose sum is σ = 208256472. Its totient is φ = 69332256.

The previous prime is 138751069. The next prime is 138751079. The reversal of 138751078 is 870157831.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 138751078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138751079) 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, 17475 + ... + 24142.

It is an arithmetic number, because the mean of its divisors is an integer number (26032059).

Almost surely, 2^138751078 is an apocalyptic number.

138751078 is a deficient number, since it is larger than the sum of its proper divisors (69505394).

138751078 is a wasteful number, since it uses less digits than its factorization.

138751078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43286.

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 138751078 is about 11779.2647478525. The cubic root of 138751078 is about 517.7007434534.

The spelling of 138751078 in words is "one hundred thirty-eight million, seven hundred fifty-one thousand, seventy-eight".