2840117 has 4 divisors (see below), whose sum is σ = 3245856. Its totient is φ = 2434380.

The previous prime is 2840113. The next prime is 2840119. The reversal of 2840117 is 7110482.

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 an emirpimes, since its reverse is a distinct semiprime: 7110482 = 2 ⋅3555241.

It is a cyclic number.

It is not a de Polignac number, because 2840117 - 2² = 2840113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2840092 and 2840101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840113) 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, 202859 + ... + 202872.

It is an arithmetic number, because the mean of its divisors is an integer number (811464).

2^2840117 is an apocalyptic number.

It is an amenable number.

2840117 is a deficient number, since it is larger than the sum of its proper divisors (405739).

2840117 is an equidigital number, since it uses as much as digits as its factorization.

2840117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405738.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 2840117 is about 1685.2646676413. The cubic root of 2840117 is about 141.6159196939.

Adding to 2840117 its reverse (7110482), we get a palindrome (9950599).

The spelling of 2840117 in words is "two million, eight hundred forty thousand, one hundred seventeen".