138336804 has 18 divisors (see below), whose sum is σ = 349684790. Its totient is φ = 46112256.

The previous prime is 138336763. The next prime is 138336827. The reversal of 138336804 is 408633831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 138297600 + 39204 = 11760^2 + 198^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3842689 = 138336804 / (1 + 3 + 8 + 3 + 3 + 6 + 8 + 0 + 4).

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 5 ways as a sum of consecutive naturals, for example, 1921309 + ... + 1921380.

Almost surely, 2^138336804 is an apocalyptic number.

It is an amenable number.

138336804 is an abundant number, since it is smaller than the sum of its proper divisors (211347986).

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

138336804 is a wasteful number, since it uses less digits than its factorization.

138336804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842699 (or 3842694 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 138336804 is about 11761.6667186245. Note that the first 3 decimals coincide. The cubic root of 138336804 is about 517.1849906731.

The spelling of 138336804 in words is "one hundred thirty-eight million, three hundred thirty-six thousand, eight hundred four".