138315670 has 32 divisors (see below), whose sum is σ = 254555136. Its totient is φ = 54096000.

The previous prime is 138315643. The next prime is 138315677. The reversal of 138315670 is 76513831.

138315670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138315677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119595 + ... + 120745.

It is an arithmetic number, because the mean of its divisors is an integer number (7954848).

Almost surely, 2^138315670 is an apocalyptic number.

138315670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138315670 is a deficient number, since it is larger than the sum of its proper divisors (116239466).

138315670 is a wasteful number, since it uses less digits than its factorization.

138315670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 138315670 is about 11760.7682572186. The cubic root of 138315670 is about 517.1586521911.

The spelling of 138315670 in words is "one hundred thirty-eight million, three hundred fifteen thousand, six hundred seventy".