2780766 has 12 divisors (see below), whose sum is σ = 6025032. Its totient is φ = 926916.

The previous prime is 2780761. The next prime is 2780773. The reversal of 2780766 is 6670872.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2780766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77226 + ... + 77261.

It is an arithmetic number, because the mean of its divisors is an integer number (502086).

2^2780766 is an apocalyptic number.

2780766 is an abundant number, since it is smaller than the sum of its proper divisors (3244266).

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

2780766 is a wasteful number, since it uses less digits than its factorization.

2780766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154495 (or 154492 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 2780766 is about 1667.5628923672. The cubic root of 2780766 is about 140.6225001037.

The spelling of 2780766 in words is "two million, seven hundred eighty thousand, seven hundred sixty-six".