138377830 has 16 divisors (see below), whose sum is σ = 250171920. Its totient is φ = 55108512.

The previous prime is 138377819. The next prime is 138377861. The reversal of 138377830 is 38773831.

138377830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27924 + ... + 32503.

It is an arithmetic number, because the mean of its divisors is an integer number (15635745).

Almost surely, 2^138377830 is an apocalyptic number.

138377830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138377830 is a deficient number, since it is larger than the sum of its proper divisors (111794090).

138377830 is a wasteful number, since it uses less digits than its factorization.

138377830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60663.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 138377830 is about 11763.4106448768. The cubic root of 138377830 is about 517.2361121236.

The spelling of 138377830 in words is "one hundred thirty-eight million, three hundred seventy-seven thousand, eight hundred thirty".