3998159360 has 160 divisors (see below), whose sum is σ = 10868679360. Its totient is φ = 1398325248.

The previous prime is 3998159359. The next prime is 3998159369. The reversal of 3998159360 is 639518993.

It is a Cunningham number, because it is equal to 63231²-1.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (3998159369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629159 + ... + 635481.

It is an arithmetic number, because the mean of its divisors is an integer number (67929246).

Almost surely, 2^3998159360 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 3998159360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5434339680).

3998159360 is an abundant number, since it is smaller than the sum of its proper divisors (6870520000).

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

3998159360 is a wasteful number, since it uses less digits than its factorization.

3998159360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6378 (or 6362 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 53.

The square root of 3998159360 is about 63230.9999920925. Note that the first 5 decimals coincide. The cubic root of 3998159360 is about 1587.1575284551.

The spelling of 3998159360 in words is "three billion, nine hundred ninety-eight million, one hundred fifty-nine thousand, three hundred sixty".