138207734 has 64 divisors (see below), whose sum is σ = 255897600. Its totient is φ = 55883520.

The previous prime is 138207731. The next prime is 138207737. The reversal of 138207734 is 437702831.

It is an interprime number because it is at equal distance from previous prime (138207731) and next prime (138207737).

It is a junction number, because it is equal to n+sod(n) for n = 138207694 and 138207703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138207731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1424774 + ... + 1424870.

It is an arithmetic number, because the mean of its divisors is an integer number (3998400).

Almost surely, 2^138207734 is an apocalyptic number.

138207734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138207734 is a deficient number, since it is larger than the sum of its proper divisors (117689866).

138207734 is an equidigital number, since it uses as much as digits as its factorization.

138207734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 138207734 is about 11756.1785457690. The cubic root of 138207734 is about 517.0240938954.

The spelling of 138207734 in words is "one hundred thirty-eight million, two hundred seven thousand, seven hundred thirty-four".