23643028 has 12 divisors (see below), whose sum is σ = 41840820. Its totient is φ = 11688512.

The previous prime is 23643017. The next prime is 23643047. The reversal of 23643028 is 82034632.

It can be written as a sum of positive squares in 2 ways, for example, as 5817744 + 17825284 = 2412^2 + 4222^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23642987 and 23643005.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 32851 + ... + 33562.

It is an arithmetic number, because the mean of its divisors is an integer number (3486735).

Almost surely, 2^23643028 is an apocalyptic number.

It is an amenable number.

23643028 is a deficient number, since it is larger than the sum of its proper divisors (18197792).

23643028 is a wasteful number, since it uses less digits than its factorization.

23643028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66506 (or 66504 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 23643028 is about 4862.4096906781. The cubic root of 23643028 is about 287.0126457863.

It can be divided in two parts, 236 and 43028, that added together give a square (43264 = 208²).

The spelling of 23643028 in words is "twenty-three million, six hundred forty-three thousand, twenty-eight".