5721920 has 28 divisors (see below), whose sum is σ = 13626084. Its totient is φ = 2288640.

The previous prime is 5721913. The next prime is 5721929. The reversal of 5721920 is 291275.

It can be written as a sum of positive squares in 2 ways, for example, as 2096704 + 3625216 = 1448^2 + 1904^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 5721920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5721929) 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 3 ways as a sum of consecutive naturals, for example, 8621 + ... + 9260.

Almost surely, 2^5721920 is an apocalyptic number.

It is an amenable number.

5721920 is an abundant number, since it is smaller than the sum of its proper divisors (7904164).

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

5721920 is a wasteful number, since it uses less digits than its factorization.

5721920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17898 (or 17888 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 5721920 is about 2392.0535111071. The cubic root of 5721920 is about 178.8602885977.

The spelling of 5721920 in words is "five million, seven hundred twenty-one thousand, nine hundred twenty".