23638516 has 24 divisors (see below), whose sum is σ = 45412416. Its totient is φ = 10677120.

The previous prime is 23638507. The next prime is 23638529. The reversal of 23638516 is 61583632.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5740 + ... + 8956.

It is an arithmetic number, because the mean of its divisors is an integer number (1892184).

Almost surely, 2^23638516 is an apocalyptic number.

It is an amenable number.

23638516 is a deficient number, since it is larger than the sum of its proper divisors (21773900).

23638516 is a wasteful number, since it uses less digits than its factorization.

23638516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399 (or 3397 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 23638516 is about 4861.9457010543. The cubic root of 23638516 is about 286.9943869371.

Subtracting 23638516 from its reverse (61583632), we obtain a triangular number (37945116 = T₈₇₁₁).

The spelling of 23638516 in words is "twenty-three million, six hundred thirty-eight thousand, five hundred sixteen".