3985997194872 has 480 divisors, whose sum is σ = 14783941307520. Its totient is φ = 990307866240.

The previous prime is 3985997194871. The next prime is 3985997194873. The reversal of 3985997194872 is 2784917995893.

3985997194872 is a `hidden beast` number, since 3 + 9 + 8 + 599 + 7 + 19 + 4 + 8 + 7 + 2 = 666.

3985997194872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3985997194871) and next prime (3985997194873).

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 3985997194791 and 3985997194800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985997194871) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 7785163 + ... + 8281349.

It is an arithmetic number, because the mean of its divisors is an integer number (30799877724).

Almost surely, 2^{3985997194872} 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 3985997194872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7391970653760).

3985997194872 is an abundant number, since it is smaller than the sum of its proper divisors (10797944112648).

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

3985997194872 is a wasteful number, since it uses less digits than its factorization.

3985997194872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496253 (or 496233 counting only the distinct ones).

The product of its digits is 2469035520, while the sum is 81.

The spelling of 3985997194872 in words is "three trillion, nine hundred eighty-five billion, nine hundred ninety-seven million, one hundred ninety-four thousand, eight hundred seventy-two".