5721818 has 8 divisors (see below), whose sum is σ = 8648640. Its totient is φ = 2838940.

The previous prime is 5721817. The next prime is 5721823. The reversal of 5721818 is 8181275.

It is a happy number.

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

5721818 is a modest number, since divided by 1818 gives 572 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5721817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10658 + ... + 11181.

It is an arithmetic number, because the mean of its divisors is an integer number (1081080).

Almost surely, 2^5721818 is an apocalyptic number.

5721818 is a deficient number, since it is larger than the sum of its proper divisors (2926822).

5721818 is a wasteful number, since it uses less digits than its factorization.

5721818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21972.

The product of its digits is 4480, while the sum is 32.

The square root of 5721818 is about 2392.0321904188. The cubic root of 5721818 is about 178.8592257926.

The spelling of 5721818 in words is "five million, seven hundred twenty-one thousand, eight hundred eighteen".