5866644 has 48 divisors (see below), whose sum is σ = 15766016. Its totient is φ = 1663200.

The previous prime is 5866631. The next prime is 5866661. The reversal of 5866644 is 4466685.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17559 + ... + 17889.

Almost surely, 2^5866644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5866644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7883008).

5866644 is an abundant number, since it is smaller than the sum of its proper divisors (9899372).

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

5866644 is a wasteful number, since it uses less digits than its factorization.

5866644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 554 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 5866644 is about 2422.1156041775. The cubic root of 5866644 is about 180.3557163228.

The spelling of 5866644 in words is "five million, eight hundred sixty-six thousand, six hundred forty-four".