138038970 has 32 divisors (see below), whose sum is σ = 341982720. Its totient is φ = 35622720.

The previous prime is 138038941. The next prime is 138038983. The reversal of 138038970 is 79830831.

138038970 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73285 + ... + 75144.

It is an arithmetic number, because the mean of its divisors is an integer number (10686960).

Almost surely, 2^138038970 is an apocalyptic number.

138038970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138038970 is an abundant number, since it is smaller than the sum of its proper divisors (203943750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138038970 is a wasteful number, since it uses less digits than its factorization.

138038970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148470.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 138038970 is about 11748.9986807387. The cubic root of 138038970 is about 516.8135639654.

The spelling of 138038970 in words is "one hundred thirty-eight million, thirty-eight thousand, nine hundred seventy".