3949242728 has 16 divisors (see below), whose sum is σ = 7405534500. Its totient is φ = 1974433536.

The previous prime is 3949242709. The next prime is 3949242779. The reversal of 3949242728 is 8272429493.

3949242728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3896506084 + 52736644 = 62422^2 + 7262^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111578 + ... + 142646.

Almost surely, 2^3949242728 is an apocalyptic number.

It is an amenable number.

3949242728 is a deficient number, since it is larger than the sum of its proper divisors (3456291772).

3949242728 is a wasteful number, since it uses less digits than its factorization.

3949242728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46964 (or 46960 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 3949242728 is about 62843.0006285505. Note that the first 3 decimals coincide. The cubic root of 3949242728 is about 1580.6581043122.

The spelling of 3949242728 in words is "three billion, nine hundred forty-nine million, two hundred forty-two thousand, seven hundred twenty-eight".