138801178 has 8 divisors (see below), whose sum is σ = 211054068. Its totient is φ = 68449824.

The previous prime is 138801151. The next prime is 138801191. The reversal of 138801178 is 871108831.

It can be written as a sum of positive squares in 2 ways, for example, as 131033809 + 7767369 = 11447^2 + 2787^2 .

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

It is a super-3 number, since 3×138801178³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

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, 475201 + ... + 475492.

Almost surely, 2^138801178 is an apocalyptic number.

138801178 is a deficient number, since it is larger than the sum of its proper divisors (72252890).

138801178 is an equidigital number, since it uses as much as digits as its factorization.

138801178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950768.

The product of its (nonzero) digits is 10752, while the sum is 37.

The square root of 138801178 is about 11781.3911742205. The cubic root of 138801178 is about 517.7630461192.

The spelling of 138801178 in words is "one hundred thirty-eight million, eight hundred one thousand, one hundred seventy-eight".