138786230 has 32 divisors (see below), whose sum is σ = 279181728. Its totient is φ = 49235200.

The previous prime is 138786191. The next prime is 138786233. The reversal of 138786230 is 32687831.

It is a happy number.

138786230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138786230² = 38523235275225800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138786233) 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, 10877 + ... + 19896.

It is an arithmetic number, because the mean of its divisors is an integer number (8724429).

Almost surely, 2^138786230 is an apocalyptic number.

138786230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138786230 is an abundant number, since it is smaller than the sum of its proper divisors (140395498).

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

138786230 is a wasteful number, since it uses less digits than its factorization.

138786230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30832.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 138786230 is about 11780.7567668635. The cubic root of 138786230 is about 517.7444588613.

The spelling of 138786230 in words is "one hundred thirty-eight million, seven hundred eighty-six thousand, two hundred thirty".