6538220 has 24 divisors (see below), whose sum is σ = 14787024. Its totient is φ = 2414016.

The previous prime is 6538219. The next prime is 6538267. The reversal of 6538220 is 228356.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 6538220.

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, 12314 + ... + 12833.

It is an arithmetic number, because the mean of its divisors is an integer number (616126).

Almost surely, 2^6538220 is an apocalyptic number.

It is an amenable number.

6538220 is an abundant number, since it is smaller than the sum of its proper divisors (8248804).

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

6538220 is a wasteful number, since it uses less digits than its factorization.

6538220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25169 (or 25167 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6538220 is about 2556.9943292859. The cubic root of 6538220 is about 186.9906293264.

The spelling of 6538220 in words is "six million, five hundred thirty-eight thousand, two hundred twenty".