138398896 has 20 divisors (see below), whose sum is σ = 272694600. Its totient is φ = 68026112.

The previous prime is 138398893. The next prime is 138398917. The reversal of 138398896 is 698893831.

It is a happy number.

138398896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138398891) 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, 72361 + ... + 74248.

It is an arithmetic number, because the mean of its divisors is an integer number (13634730).

Almost surely, 2^138398896 is an apocalyptic number.

138398896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138398896 is a deficient number, since it is larger than the sum of its proper divisors (134295704).

138398896 is a wasteful number, since it uses less digits than its factorization.

138398896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146676 (or 146670 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 55.

The square root of 138398896 is about 11764.3060143810. The cubic root of 138398896 is about 517.2623580019.

The spelling of 138398896 in words is "one hundred thirty-eight million, three hundred ninety-eight thousand, eight hundred ninety-six".