138357930 has 16 divisors (see below), whose sum is σ = 332059104. Its totient is φ = 36895440.

The previous prime is 138357893. The next prime is 138357941. The reversal of 138357930 is 39753831.

138357930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2305936 + ... + 2305995.

It is an arithmetic number, because the mean of its divisors is an integer number (20753694).

Almost surely, 2^138357930 is an apocalyptic number.

138357930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138357930 is an abundant number, since it is smaller than the sum of its proper divisors (193701174).

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

138357930 is a wasteful number, since it uses less digits than its factorization.

138357930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611941.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 138357930 is about 11762.5647713413. The cubic root of 138357930 is about 517.2113165041.

The spelling of 138357930 in words is "one hundred thirty-eight million, three hundred fifty-seven thousand, nine hundred thirty".