23538644 has 18 divisors (see below), whose sum is σ = 43477434. Its totient is φ = 11149200.

The previous prime is 23538643. The next prime is 23538653. The reversal of 23538644 is 44683532.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 976144 = 4750^2 + 988^2 .

It is a super-2 number, since 2×23538644² = 1108135522717472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23538643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6707 + ... + 9594.

It is an arithmetic number, because the mean of its divisors is an integer number (2415413).

Almost surely, 2^23538644 is an apocalyptic number.

It is an amenable number.

23538644 is a deficient number, since it is larger than the sum of its proper divisors (19938790).

23538644 is a wasteful number, since it uses less digits than its factorization.

23538644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16343 (or 16322 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 23538644 is about 4851.6640444285. The cubic root of 23538644 is about 286.5896355732.

The spelling of 23538644 in words is "twenty-three million, five hundred thirty-eight thousand, six hundred forty-four".