6439220870 has 32 divisors (see below), whose sum is σ = 11688636960. Its totient is φ = 2553949440.

The previous prime is 6439220861. The next prime is 6439220873. The reversal of 6439220870 is 780229346.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439220873) 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, 1322240 + ... + 1327100.

It is an arithmetic number, because the mean of its divisors is an integer number (365269905).

Almost surely, 2^6439220870 is an apocalyptic number.

6439220870 is a deficient number, since it is larger than the sum of its proper divisors (5249416090).

6439220870 is a wasteful number, since it uses less digits than its factorization.

6439220870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5960.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 6439220870 is about 80244.7560280421. The cubic root of 6439220870 is about 1860.4204612721.

The spelling of 6439220870 in words is "six billion, four hundred thirty-nine million, two hundred twenty thousand, eight hundred seventy".