23709456 has 80 divisors (see below), whose sum is σ = 69102720. Its totient is φ = 7781760.

The previous prime is 23709431. The next prime is 23709463. The reversal of 23709456 is 65490732.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 23709456.

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 15 ways as a sum of consecutive naturals, for example, 30286 + ... + 31058.

It is an arithmetic number, because the mean of its divisors is an integer number (863784).

Almost surely, 2^23709456 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 23709456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34551360).

23709456 is an abundant number, since it is smaller than the sum of its proper divisors (45393264).

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

23709456 is a wasteful number, since it uses less digits than its factorization.

23709456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 849 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 23709456 is about 4869.2356689731. The cubic root of 23709456 is about 287.2811935665.

The spelling of 23709456 in words is "twenty-three million, seven hundred nine thousand, four hundred fifty-six".