138573636 has 24 divisors (see below), whose sum is σ = 323737344. Its totient is φ = 46134240.

The previous prime is 138573619. The next prime is 138573653. The reversal of 138573636 is 636375831.

It is an interprime number because it is at equal distance from previous prime (138573619) and next prime (138573653).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3666 + ... + 17046.

It is an arithmetic number, because the mean of its divisors is an integer number (13489056).

Almost surely, 2^138573636 is an apocalyptic number.

It is an amenable number.

138573636 is an abundant number, since it is smaller than the sum of its proper divisors (185163708).

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

138573636 is a wasteful number, since it uses less digits than its factorization.

138573636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14251 (or 14249 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The square root of 138573636 is about 11771.7303740784. The cubic root of 138573636 is about 517.4799618837.

The spelling of 138573636 in words is "one hundred thirty-eight million, five hundred seventy-three thousand, six hundred thirty-six".