138751378 has 8 divisors (see below), whose sum is σ = 208177200. Its totient is φ = 69358980.

The previous prime is 138751373. The next prime is 138751397. The reversal of 138751378 is 873157831.

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

It is not an unprimeable number, because it can be changed into a prime (138751373) 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, 10893 + ... + 19903.

It is an arithmetic number, because the mean of its divisors is an integer number (26022150).

Almost surely, 2^138751378 is an apocalyptic number.

138751378 is a deficient number, since it is larger than the sum of its proper divisors (69425822).

138751378 is an equidigital number, since it uses as much as digits as its factorization.

138751378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16712.

The product of its digits is 141120, while the sum is 43.

The square root of 138751378 is about 11779.2774820869. The cubic root of 138751378 is about 517.7011165678.

It can be divided in two parts, 138751 and 378, that added together give a square (139129 = 373²).

The spelling of 138751378 in words is "one hundred thirty-eight million, seven hundred fifty-one thousand, three hundred seventy-eight".