3868243521 has 8 divisors (see below), whose sum is σ = 5186472480. Its totient is φ = 2564421792.

The previous prime is 3868243517. The next prime is 3868243543. The reversal of 3868243521 is 1253428683.

3868243521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3868243521 - 2² = 3868243517 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3868243571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3601180 + ... + 3602253.

It is an arithmetic number, because the mean of its divisors is an integer number (648309060).

Almost surely, 2^3868243521 is an apocalyptic number.

It is an amenable number.

3868243521 is a deficient number, since it is larger than the sum of its proper divisors (1318228959).

3868243521 is a wasteful number, since it uses less digits than its factorization.

3868243521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7203615.

The product of its digits is 276480, while the sum is 42.

The square root of 3868243521 is about 62195.2049679073. The cubic root of 3868243521 is about 1569.7769059718.

The spelling of 3868243521 in words is "three billion, eight hundred sixty-eight million, two hundred forty-three thousand, five hundred twenty-one".