123040636 has 12 divisors (see below), whose sum is σ = 215401480. Its totient is φ = 61497360.

The previous prime is 123040633. The next prime is 123040661. The reversal of 123040636 is 636040321.

It is a self number, because there is not a number n which added to its sum of digits gives 123040636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123040633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13435 + ... + 20653.

Almost surely, 2^123040636 is an apocalyptic number.

It is an amenable number.

123040636 is a deficient number, since it is larger than the sum of its proper divisors (92360844).

123040636 is a wasteful number, since it uses less digits than its factorization.

123040636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11484 (or 11482 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 123040636 is about 11092.3683674858. The cubic root of 123040636 is about 497.3737443813.

Adding to 123040636 its reverse (636040321), we get a palindrome (759080957).

The spelling of 123040636 in words is "one hundred twenty-three million, forty thousand, six hundred thirty-six".