6604840 has 64 divisors (see below), whose sum is σ = 17184960. Its totient is φ = 2257920.

The previous prime is 6604817. The next prime is 6604847. The reversal of 6604840 is 484066.

It is a super-2 number, since 2×6604840² = 87247822851200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6604799 and 6604808.

It is not an unprimeable number, because it can be changed into a prime (6604847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7039 + ... + 7921.

It is an arithmetic number, because the mean of its divisors is an integer number (268515).

Almost surely, 2^6604840 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 6604840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8592480).

6604840 is an abundant number, since it is smaller than the sum of its proper divisors (10580120).

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

6604840 is a wasteful number, since it uses less digits than its factorization.

6604840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 6604840 is about 2569.9883268217. The cubic root of 6604840 is about 187.6235866707.

The spelling of 6604840 in words is "six million, six hundred four thousand, eight hundred forty".