138575770 has 8 divisors (see below), whose sum is σ = 249436404. Its totient is φ = 55430304.

The previous prime is 138575729. The next prime is 138575771. The reversal of 138575770 is 77575831.

138575770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 137428729 + 1147041 = 11723^2 + 1071^2 .

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 (138575771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6928779 + ... + 6928798.

Almost surely, 2^138575770 is an apocalyptic number.

138575770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138575770 is a deficient number, since it is larger than the sum of its proper divisors (110860634).

138575770 is a wasteful number, since it uses less digits than its factorization.

138575770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13857584.

The product of its (nonzero) digits is 205800, while the sum is 43.

The square root of 138575770 is about 11771.8210146094. The cubic root of 138575770 is about 517.4826182249.

The spelling of 138575770 in words is "one hundred thirty-eight million, five hundred seventy-five thousand, seven hundred seventy".