2397857 has 24 divisors (see below), whose sum is σ = 3192000. Its totient is φ = 1758240.

The previous prime is 2397853. The next prime is 2397869. The reversal of 2397857 is 7587932.

It is not a de Polignac number, because 2397857 - 2² = 2397853 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 3¹¹ + 9³ + 7 + 8⁷ + 5⁵ + 7⁶ .

It is not an unprimeable number, because it can be changed into a prime (2397851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16019 + ... + 16167.

It is an arithmetic number, because the mean of its divisors is an integer number (133000).

2^2397857 is an apocalyptic number.

It is an amenable number.

2397857 is a deficient number, since it is larger than the sum of its proper divisors (794143).

2397857 is a wasteful number, since it uses less digits than its factorization.

2397857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 186 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 2397857 is about 1548.5015337416. The cubic root of 2397857 is about 133.8467282938.

The spelling of 2397857 in words is "two million, three hundred ninety-seven thousand, eight hundred fifty-seven".