2830861 has 4 divisors (see below), whose sum is σ = 3088224. Its totient is φ = 2573500.

The previous prime is 2830859. The next prime is 2830871. The reversal of 2830861 is 1680382.

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.

It is a cyclic number.

It is not a de Polignac number, because 2830861 - 2¹ = 2830859 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 (2830801) 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, 128665 + ... + 128686.

It is an arithmetic number, because the mean of its divisors is an integer number (772056).

2^2830861 is an apocalyptic number.

It is an amenable number.

2830861 is a deficient number, since it is larger than the sum of its proper divisors (257363).

2830861 is a wasteful number, since it uses less digits than its factorization.

2830861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257362.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2830861 is about 1682.5162703522. The cubic root of 2830861 is about 141.4619091951.

The spelling of 2830861 in words is "two million, eight hundred thirty thousand, eight hundred sixty-one".