138223330 has 32 divisors (see below), whose sum is σ = 296711424. Its totient is φ = 45329856.

The previous prime is 138223301. The next prime is 138223331. The reversal of 138223330 is 33322831.

It is a happy number.

138223330 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138223295 and 138223304.

It is not an unprimeable number, because it can be changed into a prime (138223331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41317 + ... + 44536.

It is an arithmetic number, because the mean of its divisors is an integer number (9272232).

Almost surely, 2^138223330 is an apocalyptic number.

138223330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138223330 is an abundant number, since it is smaller than the sum of its proper divisors (158488094).

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

138223330 is a wasteful number, since it uses less digits than its factorization.

138223330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85890.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 138223330 is about 11756.8418378406. The cubic root of 138223330 is about 517.0435409607.

The spelling of 138223330 in words is "one hundred thirty-eight million, two hundred twenty-three thousand, three hundred thirty".