6463220 has 24 divisors (see below), whose sum is σ = 13621608. Its totient is φ = 2576000.

The previous prime is 6463189. The next prime is 6463231. The reversal of 6463220 is 223646.

It can be written as a sum of positive squares in 4 ways, for example, as 1136356 + 5326864 = 1066^2 + 2308^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8870 + ... + 9570.

It is an arithmetic number, because the mean of its divisors is an integer number (567567).

Almost surely, 2^6463220 is an apocalyptic number.

It is an amenable number.

6463220 is an abundant number, since it is smaller than the sum of its proper divisors (7158388).

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

6463220 is a wasteful number, since it uses less digits than its factorization.

6463220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 6463220 is about 2542.2863725395. The cubic root of 6463220 is about 186.2728872974.

Adding to 6463220 its reverse (223646), we get a palindrome (6686866).

The spelling of 6463220 in words is "six million, four hundred sixty-three thousand, two hundred twenty".