138841984 has 32 divisors (see below), whose sum is σ = 288631440. Its totient is φ = 66401280.

The previous prime is 138841981. The next prime is 138842027. The reversal of 138841984 is 489148831.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138841981) 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, 20637 + ... + 26524.

Almost surely, 2^138841984 is an apocalyptic number.

It is an amenable number.

138841984 is an abundant number, since it is smaller than the sum of its proper divisors (149789456).

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

138841984 is an equidigital number, since it uses as much as digits as its factorization.

138841984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47198 (or 47186 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The square root of 138841984 is about 11783.1228458334. The cubic root of 138841984 is about 517.8137800036.

The spelling of 138841984 in words is "one hundred thirty-eight million, eight hundred forty-one thousand, nine hundred eighty-four".