138916370 has 8 divisors (see below), whose sum is σ = 250049484. Its totient is φ = 55566544.

The previous prime is 138916369. The next prime is 138916373. The reversal of 138916370 is 73619831.

It can be written as a sum of positive squares in 2 ways, for example, as 129436129 + 9480241 = 11377^2 + 3079^2 .

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 (138916373) 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, 6945809 + ... + 6945828.

Almost surely, 2^138916370 is an apocalyptic number.

138916370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138916370 is a deficient number, since it is larger than the sum of its proper divisors (111133114).

138916370 is a wasteful number, since it uses less digits than its factorization.

138916370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13891644.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 138916370 is about 11786.2788869091. The cubic root of 138916370 is about 517.9062381538.

The spelling of 138916370 in words is "one hundred thirty-eight million, nine hundred sixteen thousand, three hundred seventy".