23887881 has 6 divisors (see below), whose sum is σ = 34504730. Its totient is φ = 15925248.

The previous prime is 23887849. The next prime is 23887933. The reversal of 23887881 is 18878832.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16646400 + 7241481 = 4080^2 + 2691^2 .

It is not a de Polignac number, because 23887881 - 2⁵ = 23887849 is a prime.

It is a super-2 number, since 2×23887881² = 1141261717340322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23887841) 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, 1327096 + ... + 1327113.

Almost surely, 2^23887881 is an apocalyptic number.

It is an amenable number.

23887881 is a deficient number, since it is larger than the sum of its proper divisors (10616849).

23887881 is a wasteful number, since it uses less digits than its factorization.

23887881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654215 (or 2654212 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 23887881 is about 4887.5229922733. The cubic root of 23887881 is about 288.0000361690. Note that the first 4 decimals are identical.

It can be divided in two parts, 2 and 3887881, that added together give a palindrome (3887883).

The spelling of 23887881 in words is "twenty-three million, eight hundred eighty-seven thousand, eight hundred eighty-one".