23857881 has 4 divisors (see below), whose sum is σ = 31810512. Its totient is φ = 15905252.

The previous prime is 23857861. The next prime is 23857903. The reversal of 23857881 is 18875832.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23857881 - 2⁷ = 23857753 is a prime.

It is a super-2 number, since 2×23857881² = 1138396971620322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23857861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3976311 + ... + 3976316.

It is an arithmetic number, because the mean of its divisors is an integer number (7952628).

Almost surely, 2^23857881 is an apocalyptic number.

It is an amenable number.

23857881 is a deficient number, since it is larger than the sum of its proper divisors (7952631).

23857881 is an equidigital number, since it uses as much as digits as its factorization.

23857881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7952630.

The product of its digits is 107520, while the sum is 42.

The square root of 23857881 is about 4884.4529888208. The cubic root of 23857881 is about 287.8794224219.

The spelling of 23857881 in words is "twenty-three million, eight hundred fifty-seven thousand, eight hundred eighty-one".