138404896 has 24 divisors (see below), whose sum is σ = 311411520. Its totient is φ = 59316288.

The previous prime is 138404881. The next prime is 138404897. The reversal of 138404896 is 698404831.

138404896 is digitally balanced in base 3, 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 (138404897) 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, 308716 + ... + 309163.

It is an arithmetic number, because the mean of its divisors is an integer number (12975480).

Almost surely, 2^138404896 is an apocalyptic number.

138404896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138404896 is an abundant number, since it is smaller than the sum of its proper divisors (173006624).

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

138404896 is an equidigital number, since it uses as much as digits as its factorization.

138404896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617896 (or 617888 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 138404896 is about 11764.5610202846. The cubic root of 138404896 is about 517.2698328431.

The spelling of 138404896 in words is "one hundred thirty-eight million, four hundred four thousand, eight hundred ninety-six".