138860830 has 8 divisors (see below), whose sum is σ = 249949512. Its totient is φ = 55544328.

The previous prime is 138860801. The next prime is 138860831. The reversal of 138860830 is 38068831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 138860830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138860831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6943032 + ... + 6943051.

It is an arithmetic number, because the mean of its divisors is an integer number (31243689).

Almost surely, 2^138860830 is an apocalyptic number.

138860830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138860830 is a deficient number, since it is larger than the sum of its proper divisors (111088682).

138860830 is a wasteful number, since it uses less digits than its factorization.

138860830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13886090.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 138860830 is about 11783.9225218091. The cubic root of 138860830 is about 517.8372077803.

The spelling of 138860830 in words is "one hundred thirty-eight million, eight hundred sixty thousand, eight hundred thirty".