138654438 has 32 divisors (see below), whose sum is σ = 314361600. Its totient is φ = 40417056.

The previous prime is 138654437. The next prime is 138654443. The reversal of 138654438 is 834456831.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138654438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138654433) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 45298 + ... + 48261.

It is an arithmetic number, because the mean of its divisors is an integer number (9823800).

Almost surely, 2^138654438 is an apocalyptic number.

138654438 is an abundant number, since it is smaller than the sum of its proper divisors (175707162).

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

138654438 is a wasteful number, since it uses less digits than its factorization.

138654438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93596.

The product of its digits is 276480, while the sum is 42.

The square root of 138654438 is about 11775.1619097149. The cubic root of 138654438 is about 517.5805228384.

The spelling of 138654438 in words is "one hundred thirty-eight million, six hundred fifty-four thousand, four hundred thirty-eight".