23903986 has 4 divisors (see below), whose sum is σ = 35855982. Its totient is φ = 11951992.

The previous prime is 23903983. The next prime is 23903987. The reversal of 23903986 is 68930932.

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., 15752961 + 8151025 = 3969^2 + 2855^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (23903983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5975995 + ... + 5975998.

Almost surely, 2^23903986 is an apocalyptic number.

23903986 is a deficient number, since it is larger than the sum of its proper divisors (11951996).

23903986 is a wasteful number, since it uses less digits than its factorization.

23903986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11951995.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 23903986 is about 4889.1702772556. The cubic root of 23903986 is about 288.0647439961.

The spelling of 23903986 in words is "twenty-three million, nine hundred three thousand, nine hundred eighty-six".