2820656 has 20 divisors (see below), whose sum is σ = 5654400. Its totient is φ = 1361472.

The previous prime is 2820641. The next prime is 2820667. The reversal of 2820656 is 6560282.

It is a super-2 number, since 2×2820656² = 15912200540672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576 + ... + 3503.

It is an arithmetic number, because the mean of its divisors is an integer number (282720).

2^2820656 is an apocalyptic number.

It is an amenable number.

2820656 is an abundant number, since it is smaller than the sum of its proper divisors (2833744).

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

2820656 is a wasteful number, since it uses less digits than its factorization.

2820656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116 (or 6110 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2820656 is about 1679.4808721745. The cubic root of 2820656 is about 141.2917186922.

The spelling of 2820656 in words is "two million, eight hundred twenty thousand, six hundred fifty-six".