3972758181 has 32 divisors (see below), whose sum is σ = 6228768000. Its totient is φ = 2204997120.

The previous prime is 3972758177. The next prime is 3972758183. The reversal of 3972758181 is 1818572793.

It is not a de Polignac number, because 3972758181 - 2² = 3972758177 is a prime.

It is a super-2 number, since 2×3972758181² = 31565615129404857522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972758183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187095 + ... + 207243.

It is an arithmetic number, because the mean of its divisors is an integer number (194649000).

Almost surely, 2^3972758181 is an apocalyptic number.

It is an amenable number.

3972758181 is a deficient number, since it is larger than the sum of its proper divisors (2256009819).

3972758181 is a wasteful number, since it uses less digits than its factorization.

3972758181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20429.

The product of its digits is 846720, while the sum is 51.

The square root of 3972758181 is about 63029.8197760393. The cubic root of 3972758181 is about 1583.7891990513.

The spelling of 3972758181 in words is "three billion, nine hundred seventy-two million, seven hundred fifty-eight thousand, one hundred eighty-one".