6433220 has 12 divisors (see below), whose sum is σ = 13509804. Its totient is φ = 2573280.

The previous prime is 6433211. The next prime is 6433237. The reversal of 6433220 is 223346.

It can be written as a sum of positive squares in 2 ways, for example, as 1827904 + 4605316 = 1352^2 + 2146^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 321661 = 6433220 / (6 + 4 + 3 + 3 + 2 + 2 + 0).

It is an Ulam number.

It is a d-powerful number, because it can be written as 6⁵ + 4¹¹ + 3⁶ + 3⁷ + 2¹⁷ + 2²¹ + 0 .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6433192 and 6433201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160811 + ... + 160850.

It is an arithmetic number, because the mean of its divisors is an integer number (1125817).

Almost surely, 2^6433220 is an apocalyptic number.

It is an amenable number.

6433220 is an abundant number, since it is smaller than the sum of its proper divisors (7076584).

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

6433220 is a wasteful number, since it uses less digits than its factorization.

6433220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321670 (or 321668 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 6433220 is about 2536.3793091728. The cubic root of 6433220 is about 185.9842357627.

Adding to 6433220 its reverse (223346), we get a palindrome (6656566).

The spelling of 6433220 in words is "six million, four hundred thirty-three thousand, two hundred twenty".