6420371244 has 96 divisors (see below), whose sum is σ = 18276249600. Its totient is φ = 1713337920.

The previous prime is 6420371227. The next prime is 6420371257. The reversal of 6420371244 is 4421730246.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84987 + ... + 141645.

It is an arithmetic number, because the mean of its divisors is an integer number (190377600).

Almost surely, 2^6420371244 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 6420371244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9138124800).

6420371244 is an abundant number, since it is smaller than the sum of its proper divisors (11855878356).

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

6420371244 is a wasteful number, since it uses less digits than its factorization.

6420371244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56763 (or 56761 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 6420371244 is about 80127.2191205960. The cubic root of 6420371244 is about 1858.6033416264.

The spelling of 6420371244 in words is "six billion, four hundred twenty million, three hundred seventy-one thousand, two hundred forty-four".