1720220224 has 28 divisors (see below), whose sum is σ = 3438496044. Its totient is φ = 853827584.

The previous prime is 1720220221. The next prime is 1720220321. The reversal of 1720220224 is 4220220271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 593409600 + 1126810624 = 24360^2 + 33568^2 .

It is a super-2 number, since 2×1720220224² = 5918315238117220352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1720220195 and 1720220204.

It is not an unprimeable number, because it can be changed into a prime (1720220221) 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, 89329 + ... + 106864.

Almost surely, 2^1720220224 is an apocalyptic number.

It is an amenable number.

1720220224 is a deficient number, since it is larger than the sum of its proper divisors (1718275820).

1720220224 is a wasteful number, since it uses less digits than its factorization.

1720220224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196342 (or 196332 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 1720220224 is about 41475.5376577568. The cubic root of 1720220224 is about 1198.1964165229.

Adding to 1720220224 its reverse (4220220271), we get a palindrome (5940440495).

The spelling of 1720220224 in words is "one billion, seven hundred twenty million, two hundred twenty thousand, two hundred twenty-four".