7128394394 has 16 divisors (see below), whose sum is σ = 11784902976. Its totient is φ = 3206774400.

The previous prime is 7128394381. The next prime is 7128394453. The reversal of 7128394394 is 4934938217.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1668062 + ... + 1672329.

It is an arithmetic number, because the mean of its divisors is an integer number (736556436).

Almost surely, 2^7128394394 is an apocalyptic number.

7128394394 is a deficient number, since it is larger than the sum of its proper divisors (4656508582).

7128394394 is a wasteful number, since it uses less digits than its factorization.

7128394394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340501.

The product of its digits is 1306368, while the sum is 50.

The square root of 7128394394 is about 84429.8193412730. The cubic root of 7128394394 is about 1924.5560920762.

The spelling of 7128394394 in words is "seven billion, one hundred twenty-eight million, three hundred ninety-four thousand, three hundred ninety-four".