138498184 has 64 divisors (see below), whose sum is σ = 307074240. Its totient is φ = 57845760.

The previous prime is 138498161. The next prime is 138498211. The reversal of 138498184 is 481894831.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 63252 + ... + 65404.

It is an arithmetic number, because the mean of its divisors is an integer number (4798035).

Almost surely, 2^138498184 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 138498184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153537120).

138498184 is an abundant number, since it is smaller than the sum of its proper divisors (168576056).

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

138498184 is a wasteful number, since it uses less digits than its factorization.

138498184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230 (or 2226 counting only the distinct ones).

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

The square root of 138498184 is about 11768.5251412401. The cubic root of 138498184 is about 517.3860238931.

The spelling of 138498184 in words is "one hundred thirty-eight million, four hundred ninety-eight thousand, one hundred eighty-four".