2947866 has 16 divisors (see below), whose sum is σ = 5984544. Its totient is φ = 967824.

The previous prime is 2947853. The next prime is 2947877. The reversal of 2947866 is 6687492.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3265 + ... + 4068.

It is an arithmetic number, because the mean of its divisors is an integer number (374034).

2^2947866 is an apocalyptic number.

2947866 is an abundant number, since it is smaller than the sum of its proper divisors (3036678).

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

2947866 is a wasteful number, since it uses less digits than its factorization.

2947866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7405.

The product of its digits is 145152, while the sum is 42.

The square root of 2947866 is about 1716.9350599251. The cubic root of 2947866 is about 143.3846231924.

It can be divided in two parts, 29 and 47866, that added together give a triangular number (47895 = T₃₀₉).

The spelling of 2947866 in words is "two million, nine hundred forty-seven thousand, eight hundred sixty-six".