138545044 has 12 divisors (see below), whose sum is σ = 264495168. Its totient is φ = 62975000.

The previous prime is 138545041. The next prime is 138545047. The reversal of 138545044 is 440545831.

138545044 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138545041) and next prime (138545047).

138545044 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138545041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574332 + ... + 1574419.

It is an arithmetic number, because the mean of its divisors is an integer number (22041264).

Almost surely, 2^138545044 is an apocalyptic number.

It is an amenable number.

138545044 is a deficient number, since it is larger than the sum of its proper divisors (125950124).

138545044 is a wasteful number, since it uses less digits than its factorization.

138545044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3148766 (or 3148764 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 138545044 is about 11770.5158765451. The cubic root of 138545044 is about 517.4443687622. Note that the first 3 decimals are identical.

The spelling of 138545044 in words is "one hundred thirty-eight million, five hundred forty-five thousand, forty-four".