123669656 has 32 divisors (see below), whose sum is σ = 255301200. Its totient is φ = 55693440.

The previous prime is 123669649. The next prime is 123669661. The reversal of 123669656 is 656966321.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3146 + ... + 16038.

Almost surely, 2^123669656 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 123669656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127650600).

123669656 is an abundant number, since it is smaller than the sum of its proper divisors (131631544).

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

123669656 is a wasteful number, since it uses less digits than its factorization.

123669656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13019 (or 13015 counting only the distinct ones).

The product of its digits is 349920, while the sum is 44.

The square root of 123669656 is about 11120.6859500662. The cubic root of 123669656 is about 498.2198778515.

It can be divided in two parts, 12366 and 9656, that added together give a palindrome (22022).

The spelling of 123669656 in words is "one hundred twenty-three million, six hundred sixty-nine thousand, six hundred fifty-six".