138031072 has 12 divisors (see below), whose sum is σ = 271748736. Its totient is φ = 69015520.

The previous prime is 138031037. The next prime is 138031081. The reversal of 138031072 is 270130831.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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 as a sum of consecutive naturals, namely, 2156704 + ... + 2156767.

It is an arithmetic number, because the mean of its divisors is an integer number (22645728).

Almost surely, 2^138031072 is an apocalyptic number.

It is an amenable number.

138031072 is a deficient number, since it is larger than the sum of its proper divisors (133717664).

138031072 is an equidigital number, since it uses as much as digits as its factorization.

138031072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313481 (or 4313473 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 138031072 is about 11748.6625621813. The cubic root of 138031072 is about 516.8037071561.

The spelling of 138031072 in words is "one hundred thirty-eight million, thirty-one thousand, seventy-two".