123864784 has 20 divisors (see below), whose sum is σ = 242367300. Its totient is φ = 61318400.

The previous prime is 123864779. The next prime is 123864791. The reversal of 123864784 is 487468321.

It can be written as a sum of positive squares in 2 ways, for example, as 118200384 + 5664400 = 10872^2 + 2380^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123864784.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 36709 + ... + 39940.

It is an arithmetic number, because the mean of its divisors is an integer number (12118365).

Almost surely, 2^123864784 is an apocalyptic number.

It is an amenable number.

123864784 is a deficient number, since it is larger than the sum of its proper divisors (118502516).

123864784 is a wasteful number, since it uses less digits than its factorization.

123864784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76758 (or 76752 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 123864784 is about 11129.4556919914. The cubic root of 123864784 is about 498.4817733081.

The spelling of 123864784 in words is "one hundred twenty-three million, eight hundred sixty-four thousand, seven hundred eighty-four".