123699456 has 108 divisors (see below), whose sum is σ = 363744108. Its totient is φ = 40415232.

The previous prime is 123699439. The next prime is 123699479. The reversal of 123699456 is 654996321.

It can be written as a sum of positive squares in 2 ways, for example, as 31539456 + 92160000 = 5616^2 + 9600^2 .

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 11 ways as a sum of consecutive naturals, for example, 121606 + ... + 122618.

It is an arithmetic number, because the mean of its divisors is an integer number (3368001).

Almost surely, 2^123699456 is an apocalyptic number.

123699456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123699456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181872054).

123699456 is an abundant number, since it is smaller than the sum of its proper divisors (240044652).

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

123699456 is a wasteful number, since it uses less digits than its factorization.

123699456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 1071 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 123699456 is about 11122.0257147698. The cubic root of 123699456 is about 498.2598924098.

The spelling of 123699456 in words is "one hundred twenty-three million, six hundred ninety-nine thousand, four hundred fifty-six".