6399022032 has 220 divisors, whose sum is σ = 20066036004. Its totient is φ = 1965150720.

The previous prime is 6399022031. The next prime is 6399022039. The reversal of 6399022032 is 2302209936.

It can be written as a sum of positive squares in 2 ways, for example, as 1364268096 + 5034753936 = 36936^2 + 70956^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399022031) by changing a digit.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 12281932 + ... + 12282452.

Almost surely, 2^6399022032 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 6399022032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10033018002).

6399022032 is an abundant number, since it is smaller than the sum of its proper divisors (13667013972).

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

6399022032 is an equidigital number, since it uses as much as digits as its factorization.

6399022032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 6399022032 is about 79993.8874664808. The cubic root of 6399022032 is about 1856.5409593496.

The spelling of 6399022032 in words is "six billion, three hundred ninety-nine million, twenty-two thousand, thirty-two".