2389857 has 4 divisors (see below), whose sum is σ = 3186480. Its totient is φ = 1593236.

The previous prime is 2389853. The next prime is 2389859. The reversal of 2389857 is 7589832.

2389857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2389857 - 2² = 2389853 is a prime.

It is a super-2 number, since 2×2389857² = 11422832960898, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2389853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398307 + ... + 398312.

It is an arithmetic number, because the mean of its divisors is an integer number (796620).

2^2389857 is an apocalyptic number.

It is an amenable number.

2389857 is a deficient number, since it is larger than the sum of its proper divisors (796623).

2389857 is an equidigital number, since it uses as much as digits as its factorization.

2389857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796622.

The product of its digits is 120960, while the sum is 42.

The square root of 2389857 is about 1545.9162331769. The cubic root of 2389857 is about 133.6977109489.

The spelling of 2389857 in words is "two million, three hundred eighty-nine thousand, eight hundred fifty-seven".