6398396784 has 180 divisors, whose sum is σ = 19521065304. Its totient is φ = 1955446272.

The previous prime is 6398396773. The next prime is 6398396801. The reversal of 6398396784 is 4876938936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3965962 + ... + 3967574.

Almost surely, 2^6398396784 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 6398396784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9760532652).

6398396784 is an abundant number, since it is smaller than the sum of its proper divisors (13122668520).

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

6398396784 is a wasteful number, since it uses less digits than its factorization.

6398396784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816 (or 1794 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 63.

The square root of 6398396784 is about 79989.9792724064. The cubic root of 6398396784 is about 1856.4804898839.

The spelling of 6398396784 in words is "six billion, three hundred ninety-eight million, three hundred ninety-six thousand, seven hundred eighty-four".