3973897158 has 128 divisors (see below), whose sum is σ = 10644480000. Its totient is φ = 977749920.

The previous prime is 3973897133. The next prime is 3973897201. The reversal of 3973897158 is 8517983793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 425503 + ... + 434741.

It is an arithmetic number, because the mean of its divisors is an integer number (83160000).

Almost surely, 2^3973897158 is an apocalyptic number.

3973897158 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3973897158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5322240000).

3973897158 is an abundant number, since it is smaller than the sum of its proper divisors (6670582842).

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

3973897158 is a wasteful number, since it uses less digits than its factorization.

3973897158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9295 (or 9281 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 60.

The square root of 3973897158 is about 63038.8543518995. The cubic root of 3973897158 is about 1583.9405403466.

The spelling of 3973897158 in words is "three billion, nine hundred seventy-three million, eight hundred ninety-seven thousand, one hundred fifty-eight".