138494484 has 72 divisors (see below), whose sum is σ = 363813632. Its totient is φ = 44375040.

The previous prime is 138494483. The next prime is 138494509. The reversal of 138494484 is 484494831.

138494484 is a `hidden beast` number, since 1 + 3 + 84 + 94 + 484 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138494483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215067 + ... + 215709.

Almost surely, 2^138494484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138494484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181906816).

138494484 is an abundant number, since it is smaller than the sum of its proper divisors (225319148).

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

138494484 is a wasteful number, since it uses less digits than its factorization.

138494484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877 (or 872 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 138494484 is about 11768.3679412228. The cubic root of 138494484 is about 517.3814165033.

The spelling of 138494484 in words is "one hundred thirty-eight million, four hundred ninety-four thousand, four hundred eighty-four".