2620866 has 8 divisors (see below), whose sum is σ = 5241744. Its totient is φ = 873620.

The previous prime is 2620847. The next prime is 2620883. The reversal of 2620866 is 6680262.

It is a sphenic number, since it is the product of 3 distinct primes.

2620866 is an admirable number.

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, 218400 + ... + 218411.

It is an arithmetic number, because the mean of its divisors is an integer number (655218).

2^2620866 is an apocalyptic number.

2620866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2620866 is a wasteful number, since it uses less digits than its factorization.

2620866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436816.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 2620866 is about 1618.9088918157. The cubic root of 2620866 is about 137.8737555805.

Adding to 2620866 its product of nonzero digits (6912), we get a triangular number (2627778 = T₂₂₉₂).

It can be divided in two parts, 262086 and 6, that multiplied together give a square (1572516 = 1254²).

The spelling of 2620866 in words is "two million, six hundred twenty thousand, eight hundred sixty-six".