6220640 has 48 divisors (see below), whose sum is σ = 15567552. Its totient is φ = 2340864.

The previous prime is 6220639. The next prime is 6220651. The reversal of 6220640 is 460226.

6220640 = T₁₉₅ + T₁₉₆ + ... + T₃₅₄.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 1577 + ... + 3863.

It is an arithmetic number, because the mean of its divisors is an integer number (324324).

Almost surely, 2^6220640 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 6220640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7783776).

6220640 is an abundant number, since it is smaller than the sum of its proper divisors (9346912).

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

6220640 is a wasteful number, since it uses less digits than its factorization.

6220640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319 (or 2311 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 6220640 is about 2494.1210876780. The cubic root of 6220640 is about 183.9126869926.

Adding to 6220640 its reverse (460226), we get a palindrome (6680866).

It can be divided in two parts, 62 and 20640, that added together give a palindrome (20702).

The spelling of 6220640 in words is "six million, two hundred twenty thousand, six hundred forty".