3997447589808 has 90 divisors (see below), whose sum is σ = 11299167438572. Its totient is φ = 1319289148800.

The previous prime is 3997447589801. The next prime is 3997447589827. The reversal of 3997447589808 is 8089857447993.

3997447589808 is a `hidden beast` number, since 3 + 9 + 97 + 447 + 5 + 8 + 9 + 80 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (3997447589801) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 108291 + ... + 2829597.

Almost surely, 2^{3997447589808} 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 3997447589808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5649583719286).

3997447589808 is an abundant number, since it is smaller than the sum of its proper divisors (7301719848764).

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

3997447589808 is a wasteful number, since it uses less digits than its factorization.

3997447589808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721523 (or 2721413 counting only the distinct ones).

The product of its (nonzero) digits is 4389396480, while the sum is 81.

The spelling of 3997447589808 in words is "three trillion, nine hundred ninety-seven billion, four hundred forty-seven million, five hundred eighty-nine thousand, eight hundred eight".