7891216328 has 16 divisors (see below), whose sum is σ = 14962279500. Its totient is φ = 3901275136.

The previous prime is 7891216327. The next prime is 7891216339. The reversal of 7891216328 is 8236121987.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7747168324 + 144048004 = 88018^2 + 12002^2 .

It is not an unprimeable number, because it can be changed into a prime (7891216327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5540873 + ... + 5542296.

Almost surely, 2^7891216328 is an apocalyptic number.

It is an amenable number.

7891216328 is a deficient number, since it is larger than the sum of its proper divisors (7071063172).

7891216328 is a wasteful number, since it uses less digits than its factorization.

7891216328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11083264 (or 11083260 counting only the distinct ones).

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

The square root of 7891216328 is about 88832.5184152740. The cubic root of 7891216328 is about 1990.8932908609.

The spelling of 7891216328 in words is "seven billion, eight hundred ninety-one million, two hundred sixteen thousand, three hundred twenty-eight".