138888462 has 16 divisors (see below), whose sum is σ = 277977600. Its totient is φ = 46262712.

The previous prime is 138888377. The next prime is 138888469. The reversal of 138888462 is 264888831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138888469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1539 + ... + 16737.

It is an arithmetic number, because the mean of its divisors is an integer number (17373600).

Almost surely, 2^138888462 is an apocalyptic number.

138888462 is an abundant number, since it is smaller than the sum of its proper divisors (139089138).

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

138888462 is a wasteful number, since it uses less digits than its factorization.

138888462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16727.

The product of its digits is 589824, while the sum is 48.

The square root of 138888462 is about 11785.0949084002. The cubic root of 138888462 is about 517.8715537479.

The spelling of 138888462 in words is "one hundred thirty-eight million, eight hundred eighty-eight thousand, four hundred sixty-two".