138884646 has 8 divisors (see below), whose sum is σ = 277769304. Its totient is φ = 46294880.

The previous prime is 138884597. The next prime is 138884657. The reversal of 138884646 is 646488831.

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

138884646 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 138884595 and 138884604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11573715 + ... + 11573726.

It is an arithmetic number, because the mean of its divisors is an integer number (34721163).

Almost surely, 2^138884646 is an apocalyptic number.

138884646 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.

138884646 is a wasteful number, since it uses less digits than its factorization.

138884646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23147446.

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

The square root of 138884646 is about 11784.9330078707. The cubic root of 138884646 is about 517.8668108150.

The spelling of 138884646 in words is "one hundred thirty-eight million, eight hundred eighty-four thousand, six hundred forty-six".