6440220204 has 48 divisors (see below), whose sum is σ = 16435560960. Its totient is φ = 1946549440.

The previous prime is 6440220169. The next prime is 6440220223. The reversal of 6440220204 is 4020220446.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11364 + ... + 114059.

It is an arithmetic number, because the mean of its divisors is an integer number (342407520).

Almost surely, 2^6440220204 is an apocalyptic number.

It is an amenable number.

6440220204 is an abundant number, since it is smaller than the sum of its proper divisors (9995340756).

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

6440220204 is a wasteful number, since it uses less digits than its factorization.

6440220204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125830 (or 125828 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 6440220204 is about 80250.9825734240. The cubic root of 6440220204 is about 1860.5166988598.

The spelling of 6440220204 in words is "six billion, four hundred forty million, two hundred twenty thousand, two hundred four".