3981272427 has 12 divisors (see below), whose sum is σ = 6273520344. Its totient is φ = 2412892320.

The previous prime is 3981272417. The next prime is 3981272429. The reversal of 3981272427 is 7242721893.

3981272427 is a `hidden beast` number, since 398 + 12 + 7 + 242 + 7 = 666.

It is not a de Polignac number, because 3981272427 - 2¹⁰ = 3981271403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3981272429) 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 11 ways as a sum of consecutive naturals, for example, 20107338 + ... + 20107535.

It is an arithmetic number, because the mean of its divisors is an integer number (522793362).

Almost surely, 2^3981272427 is an apocalyptic number.

3981272427 is a deficient number, since it is larger than the sum of its proper divisors (2292247917).

3981272427 is a wasteful number, since it uses less digits than its factorization.

3981272427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40214890 (or 40214887 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 3981272427 is about 63097.3250383881. The cubic root of 3981272427 is about 1584.9198282316.

The spelling of 3981272427 in words is "three billion, nine hundred eighty-one million, two hundred seventy-two thousand, four hundred twenty-seven".