23644442 has 4 divisors (see below), whose sum is σ = 35466666. Its totient is φ = 11822220.

The previous prime is 23644421. The next prime is 23644447. The reversal of 23644442 is 24444632.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18931201 + 4713241 = 4351^2 + 2171^2 .

It is not an unprimeable number, because it can be changed into a prime (23644447) by changing a digit.

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 as a sum of consecutive naturals, namely, 5911109 + ... + 5911112.

Almost surely, 2^23644442 is an apocalyptic number.

23644442 is a deficient number, since it is larger than the sum of its proper divisors (11822224).

23644442 is a wasteful number, since it uses less digits than its factorization.

23644442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11822223.

The product of its digits is 18432, while the sum is 29.

The square root of 23644442 is about 4862.5550896622. Note that the first 3 decimals coincide. The cubic root of 23644442 is about 287.0183673855.

The spelling of 23644442 in words is "twenty-three million, six hundred forty-four thousand, four hundred forty-two".