2828861 has 4 divisors (see below), whose sum is σ = 3232992. Its totient is φ = 2424732.

The previous prime is 2828857. The next prime is 2828867. The reversal of 2828861 is 1688282.

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: 1688282 = 2 ⋅844141.

It is a cyclic number.

It is not a de Polignac number, because 2828861 - 2² = 2828857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2828867) 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, 202055 + ... + 202068.

It is an arithmetic number, because the mean of its divisors is an integer number (808248).

2^2828861 is an apocalyptic number.

It is an amenable number.

2828861 is a deficient number, since it is larger than the sum of its proper divisors (404131).

2828861 is an equidigital number, since it uses as much as digits as its factorization.

2828861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404130.

The product of its digits is 12288, while the sum is 35.

The square root of 2828861 is about 1681.9218174457. The cubic root of 2828861 is about 141.4285871218.

The spelling of 2828861 in words is "two million, eight hundred twenty-eight thousand, eight hundred sixty-one".