7928978575 has 12 divisors (see below), whose sum is σ = 11236495600. Its totient is φ = 5437013760.

The previous prime is 7928978573. The next prime is 7928978579. The reversal of 7928978575 is 5758798297.

It is not a de Polignac number, because 7928978575 - 2¹ = 7928978573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7928978575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7928978573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22654050 + ... + 22654399.

Almost surely, 2^7928978575 is an apocalyptic number.

7928978575 is a deficient number, since it is larger than the sum of its proper divisors (3307517025).

7928978575 is a wasteful number, since it uses less digits than its factorization.

7928978575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45308466 (or 45308461 counting only the distinct ones).

The product of its digits is 88905600, while the sum is 67.

The square root of 7928978575 is about 89044.8121734220. The cubic root of 7928978575 is about 1994.0639469846.

The spelling of 7928978575 in words is "seven billion, nine hundred twenty-eight million, nine hundred seventy-eight thousand, five hundred seventy-five".