2766820 has 24 divisors (see below), whose sum is σ = 6640704. Its totient is φ = 948576.

The previous prime is 2766793. The next prime is 2766821. The reversal of 2766820 is 286672.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2766821) 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, 9742 + ... + 10021.

It is an arithmetic number, because the mean of its divisors is an integer number (276696).

2^2766820 is an apocalyptic number.

2766820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2766820 is an abundant number, since it is smaller than the sum of its proper divisors (3873884).

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

2766820 is a wasteful number, since it uses less digits than its factorization.

2766820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19779 (or 19777 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2766820 is about 1663.3760849549. The cubic root of 2766820 is about 140.3870243390.

The spelling of 2766820 in words is "two million, seven hundred sixty-six thousand, eight hundred twenty".