6520044 has 48 divisors (see below), whose sum is σ = 16644096. Its totient is φ = 1977600.

The previous prime is 6519991. The next prime is 6520057. The reversal of 6520044 is 4400256.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6520044.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5809 + ... + 6839.

It is an arithmetic number, because the mean of its divisors is an integer number (346752).

Almost surely, 2^6520044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6520044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8322048).

6520044 is an abundant number, since it is smaller than the sum of its proper divisors (10124052).

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

6520044 is a wasteful number, since it uses less digits than its factorization.

6520044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086 (or 1084 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 6520044 is about 2553.4376828112. The cubic root of 6520044 is about 186.8171929268.

The spelling of 6520044 in words is "six million, five hundred twenty thousand, forty-four".