138302636 has 12 divisors (see below), whose sum is σ = 244292328. Its totient is φ = 68504832.

The previous prime is 138302629. The next prime is 138302641. The reversal of 138302636 is 636203831.

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 3 ways as a sum of consecutive naturals, for example, 161141 + ... + 161996.

It is an arithmetic number, because the mean of its divisors is an integer number (20357694).

Almost surely, 2^138302636 is an apocalyptic number.

It is an amenable number.

138302636 is a deficient number, since it is larger than the sum of its proper divisors (105989692).

138302636 is a wasteful number, since it uses less digits than its factorization.

138302636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323248 (or 323246 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 138302636 is about 11760.2141136971. The cubic root of 138302636 is about 517.1424070864.

The spelling of 138302636 in words is "one hundred thirty-eight million, three hundred two thousand, six hundred thirty-six".