2856949 has 4 divisors (see below), whose sum is σ = 2862540. Its totient is φ = 2851360.

The previous prime is 2856923. The next prime is 2856961. The reversal of 2856949 is 9496582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1580049 + 1276900 = 1257^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2856949 - 2¹⁵ = 2824181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856149) 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, 1942 + ... + 3079.

It is an arithmetic number, because the mean of its divisors is an integer number (715635).

2^2856949 is an apocalyptic number.

It is an amenable number.

2856949 is a deficient number, since it is larger than the sum of its proper divisors (5591).

2856949 is an equidigital number, since it uses as much as digits as its factorization.

2856949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5590.

The product of its digits is 155520, while the sum is 43.

The square root of 2856949 is about 1690.2511647681. The cubic root of 2856949 is about 141.8951318570.

The spelling of 2856949 in words is "two million, eight hundred fifty-six thousand, nine hundred forty-nine".