5721606 has 72 divisors (see below), whose sum is σ = 14191632. Its totient is φ = 1663200.

The previous prime is 5721601. The next prime is 5721619. The reversal of 5721606 is 6061275.

5721606 is a `hidden beast` number, since 57 + 2 + 1 + 606 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 5721606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5721601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 80551 + ... + 80621.

It is an arithmetic number, because the mean of its divisors is an integer number (197106).

Almost surely, 2^5721606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5721606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7095816).

5721606 is an abundant number, since it is smaller than the sum of its proper divisors (8470026).

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

5721606 is a wasteful number, since it uses less digits than its factorization.

5721606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 5721606 is about 2391.9878762235. The cubic root of 5721606 is about 178.8570167846.

The spelling of 5721606 in words is "five million, seven hundred twenty-one thousand, six hundred six".