123645388 has 18 divisors (see below), whose sum is σ = 228369876. Its totient is φ = 58568184.

The previous prime is 123645383. The next prime is 123645413. The reversal of 123645388 is 883546321.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 123645388.

It is not an unprimeable number, because it can be changed into a prime (123645383) 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 5 ways as a sum of consecutive naturals, for example, 41370 + ... + 44257.

Almost surely, 2^123645388 is an apocalyptic number.

It is an amenable number.

123645388 is a deficient number, since it is larger than the sum of its proper divisors (104724488).

123645388 is a wasteful number, since it uses less digits than its factorization.

123645388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85669 (or 85648 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 123645388 is about 11119.5947767893. The cubic root of 123645388 is about 498.1872867499.

The spelling of 123645388 in words is "one hundred twenty-three million, six hundred forty-five thousand, three hundred eighty-eight".