6399954288 has 360 divisors, whose sum is σ = 23152647600. Its totient is φ = 1686956544.

The previous prime is 6399954257. The next prime is 6399954313. The reversal of 6399954288 is 8824599936.

6399954288 is a `hidden beast` number, since 6 + 3 + 9 + 9 + 9 + 542 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3576498 + ... + 3578286.

It is an arithmetic number, because the mean of its divisors is an integer number (64312910).

Almost surely, 2^6399954288 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 6399954288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11576323800).

6399954288 is an abundant number, since it is smaller than the sum of its proper divisors (16752693312).

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

6399954288 is a wasteful number, since it uses less digits than its factorization.

6399954288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846 (or 1814 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 63.

The square root of 6399954288 is about 79999.7142994898. The cubic root of 6399954288 is about 1856.6311130948.

The spelling of 6399954288 in words is "six billion, three hundred ninety-nine million, nine hundred fifty-four thousand, two hundred eighty-eight".