23456 has 12 divisors (see below), whose sum is σ = 46242. Its totient is φ = 11712.

The previous prime is 23447. The next prime is 23459. The reversal of 23456 is 65432.

23456 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 13456 + 10000 = 116^2 + 100^2 .

It is an alternating number because its digits alternate between even and odd.

It is a straight-line number, since its digits are in arithmetic progression.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (23459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335 + ... + 398.

23456 is a Friedman number, since it can be written as (4+3^6)*2^5, using all its digits and the basic arithmetic operations.

2²³⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

23456 is a deficient number, since it is larger than the sum of its proper divisors (22786).

23456 is an equidigital number, since it uses as much as digits as its factorization.

23456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743 (or 735 counting only the distinct ones).

The product of its digits is 720, while the sum is 20.

The square root of 23456 is about 153.1535177526. The cubic root of 23456 is about 28.6253837595.

Subtracting from 23456 its sum of digits (20), we obtain a triangular number (23436 = T₂₁₆).

Adding to 23456 its reverse (65432), we get a palindrome (88888).

The spelling of 23456 in words is "twenty-three thousand, four hundred fifty-six".