138783830 has 8 divisors (see below), whose sum is σ = 249810912. Its totient is φ = 55513528.

The previous prime is 138783793. The next prime is 138783851. The reversal of 138783830 is 38387831.

138783830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6939182 + ... + 6939201.

It is an arithmetic number, because the mean of its divisors is an integer number (31226364).

Almost surely, 2^138783830 is an apocalyptic number.

138783830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138783830 is a deficient number, since it is larger than the sum of its proper divisors (111027082).

138783830 is a wasteful number, since it uses less digits than its factorization.

138783830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13878390.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 138783830 is about 11780.6549053947. The cubic root of 138783830 is about 517.7414744301.

The spelling of 138783830 in words is "one hundred thirty-eight million, seven hundred eighty-three thousand, eight hundred thirty".