138324928 has 28 divisors (see below), whose sum is σ = 313702192. Its totient is φ = 59281920.

The previous prime is 138324913. The next prime is 138324943. The reversal of 138324928 is 829423831.

It is an interprime number because it is at equal distance from previous prime (138324913) and next prime (138324943).

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 153933 + ... + 154828.

Almost surely, 2^138324928 is an apocalyptic number.

It is an amenable number.

138324928 is an abundant number, since it is smaller than the sum of its proper divisors (175377264).

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

138324928 is an equidigital number, since it uses as much as digits as its factorization.

138324928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308780 (or 308770 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 138324928 is about 11761.1618473687. The cubic root of 138324928 is about 517.1701904065.

The spelling of 138324928 in words is "one hundred thirty-eight million, three hundred twenty-four thousand, nine hundred twenty-eight".