138152544 has 24 divisors (see below), whose sum is σ = 362650680. Its totient is φ = 46050816.

The previous prime is 138152543. The next prime is 138152563. The reversal of 138152544 is 445251831.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×138152544² = 38172250827343872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138152543) 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, 719449 + ... + 719640.

It is an arithmetic number, because the mean of its divisors is an integer number (15110445).

Almost surely, 2^138152544 is an apocalyptic number.

It is an amenable number.

138152544 is an abundant number, since it is smaller than the sum of its proper divisors (224498136).

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

138152544 is a wasteful number, since it uses less digits than its factorization.

138152544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439102 (or 1439094 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 138152544 is about 11753.8310350285. The cubic root of 138152544 is about 516.9552642721.

The spelling of 138152544 in words is "one hundred thirty-eight million, one hundred fifty-two thousand, five hundred forty-four".