138000724 has 12 divisors (see below), whose sum is σ = 254212000. Its totient is φ = 65368728.

The previous prime is 138000689. The next prime is 138000749. The reversal of 138000724 is 427000831.

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, 907824 + ... + 907975.

Almost surely, 2^138000724 is an apocalyptic number.

It is an amenable number.

138000724 is a deficient number, since it is larger than the sum of its proper divisors (116211276).

138000724 is a wasteful number, since it uses less digits than its factorization.

138000724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815822 (or 1815820 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 138000724 is about 11747.3709399167. The cubic root of 138000724 is about 516.7658289493.

The spelling of 138000724 in words is "one hundred thirty-eight million, seven hundred twenty-four", and thus it is an aban number.