7128752994 has 144 divisors (see below), whose sum is σ = 18450781440. Its totient is φ = 1980158400.

The previous prime is 7128752993. The next prime is 7128752999. The reversal of 7128752994 is 4992578217.

7128752994 is a `hidden beast` number, since 7 + 1 + 28 + 7 + 529 + 94 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 7128752994.

It is not an unprimeable number, because it can be changed into a prime (7128752993) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1280064 + ... + 1285620.

Almost surely, 2^7128752994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7128752994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9225390720).

7128752994 is an abundant number, since it is smaller than the sum of its proper divisors (11322028446).

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

7128752994 is a wasteful number, since it uses less digits than its factorization.

7128752994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5637 (or 5623 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 7128752994 is about 84431.9429718398. The cubic root of 7128752994 is about 1924.5883636839.

The spelling of 7128752994 in words is "seven billion, one hundred twenty-eight million, seven hundred fifty-two thousand, nine hundred ninety-four".