138187230 has 32 divisors (see below), whose sum is σ = 340615584. Its totient is φ = 35853696.

The previous prime is 138187213. The next prime is 138187241. The reversal of 138187230 is 32781831.

138187230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138187191 and 138187200.

It is a congruent number.

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, 61137 + ... + 63356.

It is an arithmetic number, because the mean of its divisors is an integer number (10644237).

Almost surely, 2^138187230 is an apocalyptic number.

138187230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138187230 is an abundant number, since it is smaller than the sum of its proper divisors (202428354).

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

138187230 is a wasteful number, since it uses less digits than its factorization.

138187230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124540.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 138187230 is about 11755.3064613391. The cubic root of 138187230 is about 516.9985246888.

The spelling of 138187230 in words is "one hundred thirty-eight million, one hundred eighty-seven thousand, two hundred thirty".