2856791 has 8 divisors (see below), whose sum is σ = 3341184. Its totient is φ = 2391480.

The previous prime is 2856779. The next prime is 2856803. The reversal of 2856791 is 1976582.

It is an interprime number because it is at equal distance from previous prime (2856779) and next prime (2856803).

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

It is a de Polignac number, because none of the positive numbers 2^k-2856791 is a prime.

It is a super-2 number, since 2×2856791² = 16322509635362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2853791) 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, 4445 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (417648).

2^2856791 is an apocalyptic number.

2856791 is a deficient number, since it is larger than the sum of its proper divisors (484393).

2856791 is an equidigital number, since it uses as much as digits as its factorization.

2856791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9541.

The product of its digits is 30240, while the sum is 38.

The square root of 2856791 is about 1690.2044255060. The cubic root of 2856791 is about 141.8925160310.

The spelling of 2856791 in words is "two million, eight hundred fifty-six thousand, seven hundred ninety-one".