2821956 has 24 divisors (see below), whose sum is σ = 6931680. Its totient is φ = 891072.

The previous prime is 2821933. The next prime is 2821957. The reversal of 2821956 is 6591282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821957) 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, 5961 + ... + 6416.

It is an arithmetic number, because the mean of its divisors is an integer number (288820).

2^2821956 is an apocalyptic number.

It is an amenable number.

2821956 is an abundant number, since it is smaller than the sum of its proper divisors (4109724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2821956 is a wasteful number, since it uses less digits than its factorization.

2821956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12403 (or 12401 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 2821956 is about 1679.8678519455. The cubic root of 2821956 is about 141.3134218023.

The spelling of 2821956 in words is "two million, eight hundred twenty-one thousand, nine hundred fifty-six".