138275320 has 32 divisors (see below), whose sum is σ = 311464800. Its totient is φ = 55248768.

The previous prime is 138275309. The next prime is 138275339. The reversal of 138275320 is 23572831.

It is a super-2 number, since 2×138275320² = 38240128242204800, which contains 22 as substring.

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, 56686 + ... + 59074.

It is an arithmetic number, because the mean of its divisors is an integer number (9733275).

Almost surely, 2^138275320 is an apocalyptic number.

138275320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138275320 is an abundant number, since it is smaller than the sum of its proper divisors (173189480).

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

138275320 is a wasteful number, since it uses less digits than its factorization.

138275320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847 (or 3843 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 138275320 is about 11759.0526829333. The cubic root of 138275320 is about 517.1083581039.

The spelling of 138275320 in words is "one hundred thirty-eight million, two hundred seventy-five thousand, three hundred twenty".