138672330 has 16 divisors (see below), whose sum is σ = 332813664. Its totient is φ = 36979280.

The previous prime is 138672329. The next prime is 138672353. The reversal of 138672330 is 33276831.

It is a junction number, because it is equal to n+sod(n) for n = 138672291 and 138672300.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2311176 + ... + 2311235.

It is an arithmetic number, because the mean of its divisors is an integer number (20800854).

Almost surely, 2^138672330 is an apocalyptic number.

138672330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138672330 is an abundant number, since it is smaller than the sum of its proper divisors (194141334).

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

138672330 is a wasteful number, since it uses less digits than its factorization.

138672330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4622421.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 138672330 is about 11775.9216199837. The cubic root of 138672330 is about 517.6027847834.

The spelling of 138672330 in words is "one hundred thirty-eight million, six hundred seventy-two thousand, three hundred thirty".