6398240000 has 90 divisors (see below), whose sum is σ = 15959649090. Its totient is φ = 2559232000.

The previous prime is 6398239963. The next prime is 6398240029. The reversal of 6398240000 is 428936.

It can be written as a sum of positive squares in 5 ways, for example, as 3714171136 + 2684068864 = 60944^2 + 51808^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 140006 + ... + 179994.

Almost surely, 2^6398240000 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 6398240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7979824545).

6398240000 is an abundant number, since it is smaller than the sum of its proper divisors (9561409090).

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

6398240000 is an frugal number, since it uses more digits than its factorization.

6398240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40025 (or 39996 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6398240000 is about 79988.9992436460. Note that the first 3 decimals coincide. The cubic root of 6398240000 is about 1856.4653262513.

Adding to 6398240000 its reverse (428936), we get a palindrome (6398668936).

The spelling of 6398240000 in words is "six billion, three hundred ninety-eight million, two hundred forty thousand".