138372770 has 16 divisors (see below), whose sum is σ = 249265080. Its totient is φ = 55305984.

The previous prime is 138372769. The next prime is 138372781. The reversal of 138372770 is 77273831.

138372770 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 4 ways, for example, as 57714409 + 80658361 = 7597^2 + 8981^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10244 + ... + 19536.

Almost surely, 2^138372770 is an apocalyptic number.

138372770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138372770 is a deficient number, since it is larger than the sum of its proper divisors (110892310).

138372770 is a wasteful number, since it uses less digits than its factorization.

138372770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10789.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 138372770 is about 11763.1955692320. The cubic root of 138372770 is about 517.2298075332.

The spelling of 138372770 in words is "one hundred thirty-eight million, three hundred seventy-two thousand, seven hundred seventy".