7128389612 has 48 divisors (see below), whose sum is σ = 13682914560. Its totient is φ = 3246048000.

The previous prime is 7128389599. The next prime is 7128389627. The reversal of 7128389612 is 2169838217.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603362 + ... + 615062.

It is an arithmetic number, because the mean of its divisors is an integer number (285060720).

Almost surely, 2^7128389612 is an apocalyptic number.

It is an amenable number.

7128389612 is a deficient number, since it is larger than the sum of its proper divisors (6554524948).

7128389612 is a wasteful number, since it uses less digits than its factorization.

7128389612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11787 (or 11751 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 7128389612 is about 84429.7910218899. The cubic root of 7128389612 is about 1924.5556617208. Note that the first 3 decimals are identical.

The spelling of 7128389612 in words is "seven billion, one hundred twenty-eight million, three hundred eighty-nine thousand, six hundred twelve".