3928389394 has 4 divisors (see below), whose sum is σ = 5892584094. Its totient is φ = 1964194696.

The previous prime is 3928389383. The next prime is 3928389449. The reversal of 3928389394 is 4939838293.

3928389394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3595801225 + 332588169 = 59965^2 + 18237^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982097347 + ... + 982097350.

Almost surely, 2^3928389394 is an apocalyptic number.

3928389394 is a deficient number, since it is larger than the sum of its proper divisors (1964194700).

3928389394 is a wasteful number, since it uses less digits than its factorization.

3928389394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964194699.

The product of its digits is 10077696, while the sum is 58.

The square root of 3928389394 is about 62676.8649024503. The cubic root of 3928389394 is about 1577.8710569996.

The spelling of 3928389394 in words is "three billion, nine hundred twenty-eight million, three hundred eighty-nine thousand, three hundred ninety-four".