2653866 has 24 divisors (see below), whose sum is σ = 5846724. Its totient is φ = 869760.

The previous prime is 2653841. The next prime is 2653867. The reversal of 2653866 is 6683562.

It can be written as a sum of positive squares in 2 ways, for example, as 2653641 + 225 = 1629^2 + 15^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2653866.

It is not an unprimeable number, because it can be changed into a prime (2653867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111 + ... + 2306.

2^2653866 is an apocalyptic number.

2653866 is an abundant number, since it is smaller than the sum of its proper divisors (3192858).

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

2653866 is a wasteful number, since it uses less digits than its factorization.

2653866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486 (or 2483 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2653866 is about 1629.0690593096. The cubic root of 2653866 is about 138.4500117185.

The spelling of 2653866 in words is "two million, six hundred fifty-three thousand, eight hundred sixty-six".