3928441009 has 4 divisors (see below), whose sum is σ = 4099242816. Its totient is φ = 3757639204.

The previous prime is 3928441003. The next prime is 3928441019. The reversal of 3928441009 is 9001448293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3928441009 - 2⁷ = 3928440881 is a prime.

It is a super-2 number, since 2×3928441009² = 30865297522385876162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3928441003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85400869 + ... + 85400914.

It is an arithmetic number, because the mean of its divisors is an integer number (1024810704).

Almost surely, 2^3928441009 is an apocalyptic number.

It is an amenable number.

3928441009 is a deficient number, since it is larger than the sum of its proper divisors (170801807).

3928441009 is a wasteful number, since it uses less digits than its factorization.

3928441009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170801806.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 3928441009 is about 62677.2766558982. The cubic root of 3928441009 is about 1577.8779675041.

The spelling of 3928441009 in words is "three billion, nine hundred twenty-eight million, four hundred forty-one thousand, nine".