7087997728 has 144 divisors (see below), whose sum is σ = 17356368960. Its totient is φ = 2783393280.

The previous prime is 7087997717. The next prime is 7087997753. The reversal of 7087997728 is 8277997807.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7087997728.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4089150 + ... + 4090882.

It is an arithmetic number, because the mean of its divisors is an integer number (120530340).

Almost surely, 2^7087997728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7087997728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8678184480).

7087997728 is an abundant number, since it is smaller than the sum of its proper divisors (10268371232).

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

7087997728 is a wasteful number, since it uses less digits than its factorization.

7087997728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 24893568, while the sum is 64.

The square root of 7087997728 is about 84190.2472261485. The cubic root of 7087997728 is about 1920.9137115156.

The spelling of 7087997728 in words is "seven billion, eighty-seven million, nine hundred ninety-seven thousand, seven hundred twenty-eight".