138619896 has 64 divisors (see below), whose sum is σ = 380678400. Its totient is φ = 41868288.

The previous prime is 138619867. The next prime is 138619931. The reversal of 138619896 is 698916831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3880 + ... + 17096.

It is an arithmetic number, because the mean of its divisors is an integer number (5948100).

Almost surely, 2^138619896 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 138619896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190339200).

138619896 is an abundant number, since it is smaller than the sum of its proper divisors (242058504).

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

138619896 is a wasteful number, since it uses less digits than its factorization.

138619896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13268 (or 13264 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 138619896 is about 11773.6950869300. The cubic root of 138619896 is about 517.5375388765.

The spelling of 138619896 in words is "one hundred thirty-eight million, six hundred nineteen thousand, eight hundred ninety-six".