5815866 has 32 divisors (see below), whose sum is σ = 13524480. Its totient is φ = 1632816.

The previous prime is 5815861. The next prime is 5815867. The reversal of 5815866 is 6685185.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5815861) 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 15 ways as a sum of consecutive naturals, for example, 1305 + ... + 3651.

It is an arithmetic number, because the mean of its divisors is an integer number (422640).

Almost surely, 2^5815866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5815866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6762240).

5815866 is an abundant number, since it is smaller than the sum of its proper divisors (7708614).

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

5815866 is a wasteful number, since it uses less digits than its factorization.

5815866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418.

The product of its digits is 57600, while the sum is 39.

The square root of 5815866 is about 2411.6106650950. The cubic root of 5815866 is about 179.8338590439.

The spelling of 5815866 in words is "five million, eight hundred fifteen thousand, eight hundred sixty-six".