2857939 has 8 divisors (see below), whose sum is σ = 3306240. Its totient is φ = 2419656.

The previous prime is 2857937. The next prime is 2857949. The reversal of 2857939 is 9397582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2857939 - 2¹ = 2857937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2857895 and 2857904.

It is not an unprimeable number, because it can be changed into a prime (2857931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1879 + ... + 3040.

It is an arithmetic number, because the mean of its divisors is an integer number (413280).

2^2857939 is an apocalyptic number.

2857939 is a deficient number, since it is larger than the sum of its proper divisors (448301).

2857939 is an equidigital number, since it uses as much as digits as its factorization.

2857939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009.

The product of its digits is 136080, while the sum is 43.

The square root of 2857939 is about 1690.5439952867. The cubic root of 2857939 is about 141.9115199640.

It can be divided in two parts, 2 and 857939, that multiplied together give a triangular number (1715878 = T₁₈₅₂).

The spelling of 2857939 in words is "two million, eight hundred fifty-seven thousand, nine hundred thirty-nine".