138886446 has 8 divisors (see below), whose sum is σ = 277772904. Its totient is φ = 46295480.

The previous prime is 138886441. The next prime is 138886453. The reversal of 138886446 is 644688831.

138886446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

138886446 is an admirable number.

It is a super-3 number, since 3×138886446³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138886395 and 138886404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138886441) 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, 11573865 + ... + 11573876.

It is an arithmetic number, because the mean of its divisors is an integer number (34721613).

Almost surely, 2^138886446 is an apocalyptic number.

138886446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138886446 is a wasteful number, since it uses less digits than its factorization.

138886446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23147746.

The product of its digits is 884736, while the sum is 48.

The square root of 138886446 is about 11785.0093763221. The cubic root of 138886446 is about 517.8690480583.

The spelling of 138886446 in words is "one hundred thirty-eight million, eight hundred eighty-six thousand, four hundred forty-six".