7128642738 has 16 divisors (see below), whose sum is σ = 16294040640. Its totient is φ = 2036755056.

The previous prime is 7128642713. The next prime is 7128642739. The reversal of 7128642738 is 8372468217.

It is not an unprimeable number, because it can be changed into a prime (7128642739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84864753 + ... + 84864836.

It is an arithmetic number, because the mean of its divisors is an integer number (1018377540).

Almost surely, 2^7128642738 is an apocalyptic number.

7128642738 is an abundant number, since it is smaller than the sum of its proper divisors (9165397902).

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

7128642738 is a wasteful number, since it uses less digits than its factorization.

7128642738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169729601.

The product of its digits is 903168, while the sum is 48.

The square root of 7128642738 is about 84431.2900410742. The cubic root of 7128642738 is about 1924.5784414946.

The spelling of 7128642738 in words is "seven billion, one hundred twenty-eight million, six hundred forty-two thousand, seven hundred thirty-eight".