3840275721 has 16 divisors (see below), whose sum is σ = 5238374400. Its totient is φ = 2501701008.

The previous prime is 3840275717. The next prime is 3840275723. The reversal of 3840275721 is 1275720483.

3840275721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3840275721 - 2² = 3840275717 is a prime.

It is a super-2 number, since 2×3840275721² = 29495435226604139682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3840275721.

It is not an unprimeable number, because it can be changed into a prime (3840275723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35401 + ... + 94518.

It is an arithmetic number, because the mean of its divisors is an integer number (327398400).

Almost surely, 2^3840275721 is an apocalyptic number.

It is an amenable number.

3840275721 is a deficient number, since it is larger than the sum of its proper divisors (1398098679).

3840275721 is a wasteful number, since it uses less digits than its factorization.

3840275721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130148.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 3840275721 is about 61969.9582136377. The cubic root of 3840275721 is about 1565.9845351268.

The spelling of 3840275721 in words is "three billion, eight hundred forty million, two hundred seventy-five thousand, seven hundred twenty-one".