3989728434 has 16 divisors (see below), whose sum is σ = 8013706272. Its totient is φ = 1324201248.

The previous prime is 3989728423. The next prime is 3989728439. The reversal of 3989728434 is 4348279893.

It is not an unprimeable number, because it can be changed into a prime (3989728439) 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 7 ways as a sum of consecutive naturals, for example, 1425544 + ... + 1428339.

It is an arithmetic number, because the mean of its divisors is an integer number (500856642).

Almost surely, 2^3989728434 is an apocalyptic number.

3989728434 is an abundant number, since it is smaller than the sum of its proper divisors (4023977838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3989728434 is a wasteful number, since it uses less digits than its factorization.

3989728434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2854121.

The product of its digits is 10450944, while the sum is 57.

The square root of 3989728434 is about 63164.2971464102. The cubic root of 3989728434 is about 1586.0411293691.

The spelling of 3989728434 in words is "three billion, nine hundred eighty-nine million, seven hundred twenty-eight thousand, four hundred thirty-four".