3928644789 has 16 divisors (see below), whose sum is σ = 5582241792. Its totient is φ = 2451918128.

The previous prime is 3928644749. The next prime is 3928644833. The reversal of 3928644789 is 9874468293.

It is not a de Polignac number, because 3928644789 - 2⁷ = 3928644661 is a prime.

It is a super-3 number, since 3×3928644789³ (a number of 30 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928644749) 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, 602469 + ... + 608954.

It is an arithmetic number, because the mean of its divisors is an integer number (348890112).

Almost surely, 2^3928644789 is an apocalyptic number.

It is an amenable number.

3928644789 is a deficient number, since it is larger than the sum of its proper divisors (1653597003).

3928644789 is a wasteful number, since it uses less digits than its factorization.

3928644789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211496.

The product of its digits is 20901888, while the sum is 60.

The square root of 3928644789 is about 62678.9022638399. The cubic root of 3928644789 is about 1577.9052501176.

The spelling of 3928644789 in words is "three billion, nine hundred twenty-eight million, six hundred forty-four thousand, seven hundred eighty-nine".