3998694168 has 192 divisors, whose sum is σ = 13486387200. Its totient is φ = 1075161600.

The previous prime is 3998694137. The next prime is 3998694283. The reversal of 3998694168 is 8614968993.

It is a happy number.

3998694168 is a `hidden beast` number, since 399 + 86 + 9 + 4 + 168 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 432393 + ... + 441543.

It is an arithmetic number, because the mean of its divisors is an integer number (70241600).

Almost surely, 2^3998694168 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 3998694168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6743193600).

3998694168 is an abundant number, since it is smaller than the sum of its proper divisors (9487693032).

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

3998694168 is a wasteful number, since it uses less digits than its factorization.

3998694168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9207 (or 9180 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The square root of 3998694168 is about 63235.2288522782. The cubic root of 3998694168 is about 1587.2282932431.

The spelling of 3998694168 in words is "three billion, nine hundred ninety-eight million, six hundred ninety-four thousand, one hundred sixty-eight".