123235664 has 40 divisors (see below), whose sum is σ = 247507968. Its totient is φ = 59379840.

The previous prime is 123235631. The next prime is 123235667. The reversal of 123235664 is 466532321.

It is a self number, because there is not a number n which added to its sum of digits gives 123235664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123235667) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 181694 + ... + 182370.

Almost surely, 2^123235664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123235664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123753984).

123235664 is an abundant number, since it is smaller than the sum of its proper divisors (124272304).

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

123235664 is a wasteful number, since it uses less digits than its factorization.

123235664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1077 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 123235664 is about 11101.1559758432. The cubic root of 123235664 is about 497.6363963618.

Adding to 123235664 its reverse (466532321), we get a palindrome (589767985).

The spelling of 123235664 in words is "one hundred twenty-three million, two hundred thirty-five thousand, six hundred sixty-four".