138071484 has 108 divisors (see below), whose sum is σ = 387542064. Its totient is φ = 41361408.

The previous prime is 138071459. The next prime is 138071503. The reversal of 138071484 is 484170831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 239004 + ... + 239580.

Almost surely, 2^138071484 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 138071484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193771032).

138071484 is an abundant number, since it is smaller than the sum of its proper divisors (249470580).

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

138071484 is a wasteful number, since it uses less digits than its factorization.

138071484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 138071484 is about 11750.3822916533. The cubic root of 138071484 is about 516.8541379112.

The spelling of 138071484 in words is "one hundred thirty-eight million, seventy-one thousand, four hundred eighty-four".