138920324 has 24 divisors (see below), whose sum is σ = 264734400. Its totient is φ = 63534240.

The previous prime is 138920273. The next prime is 138920333. The reversal of 138920324 is 423029831.

It is a happy number.

138920324 is digitally balanced in base 3, 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, 29312 + ... + 33719.

It is an arithmetic number, because the mean of its divisors is an integer number (11030600).

Almost surely, 2^138920324 is an apocalyptic number.

It is an amenable number.

138920324 is a deficient number, since it is larger than the sum of its proper divisors (125814076).

138920324 is a wasteful number, since it uses less digits than its factorization.

138920324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63083 (or 63081 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 138920324 is about 11786.4466231346. The cubic root of 138920324 is about 517.9111518580.

The spelling of 138920324 in words is "one hundred thirty-eight million, nine hundred twenty thousand, three hundred twenty-four".