23940857 has 4 divisors (see below), whose sum is σ = 23952720. Its totient is φ = 23928996.

The previous prime is 23940827. The next prime is 23940877. The reversal of 23940857 is 75804932.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23940857 - 2⁶ = 23940793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23940857.

It is not an unprimeable number, because it can be changed into a prime (23940827) 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, 2063 + ... + 7220.

It is an arithmetic number, because the mean of its divisors is an integer number (5988180).

Almost surely, 2^23940857 is an apocalyptic number.

It is an amenable number.

23940857 is a deficient number, since it is larger than the sum of its proper divisors (11863).

23940857 is an equidigital number, since it uses as much as digits as its factorization.

23940857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11862.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 23940857 is about 4892.9395050419. The cubic root of 23940857 is about 288.2127775904.

The spelling of 23940857 in words is "twenty-three million, nine hundred forty thousand, eight hundred fifty-seven".