138263230 has 32 divisors (see below), whose sum is σ = 287052480. Its totient is φ = 46967040.

The previous prime is 138263207. The next prime is 138263231. The reversal of 138263230 is 32362831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138263231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1431 + ... + 16690.

It is an arithmetic number, because the mean of its divisors is an integer number (8970390).

Almost surely, 2^138263230 is an apocalyptic number.

138263230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138263230 is an abundant number, since it is smaller than the sum of its proper divisors (148789250).

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

138263230 is a wasteful number, since it uses less digits than its factorization.

138263230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18244.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 138263230 is about 11758.5385996730. The cubic root of 138263230 is about 517.0932866694.

The spelling of 138263230 in words is "one hundred thirty-eight million, two hundred sixty-three thousand, two hundred thirty".