138766078 has 8 divisors (see below), whose sum is σ = 227071800. Its totient is φ = 63075480.

The previous prime is 138766051. The next prime is 138766079. The reversal of 138766078 is 870667831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138766079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3153753 + ... + 3153796.

It is an arithmetic number, because the mean of its divisors is an integer number (28383975).

Almost surely, 2^138766078 is an apocalyptic number.

138766078 is a deficient number, since it is larger than the sum of its proper divisors (88305722).

138766078 is a wasteful number, since it uses less digits than its factorization.

138766078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6307562.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 138766078 is about 11779.9014427116. The cubic root of 138766078 is about 517.7193985188.

The spelling of 138766078 in words is "one hundred thirty-eight million, seven hundred sixty-six thousand, seventy-eight".