8720804319 has 16 divisors (see below), whose sum is σ = 12290956800. Its totient is φ = 5484822336.

The previous prime is 8720804317. The next prime is 8720804327. The reversal of 8720804319 is 9134080278.

It is not a de Polignac number, because 8720804319 - 2¹ = 8720804317 is a prime.

It is a super-2 number, since 2×8720804319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720804317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306454 + ... + 333699.

It is an arithmetic number, because the mean of its divisors is an integer number (768184800).

Almost surely, 2^8720804319 is an apocalyptic number.

8720804319 is a deficient number, since it is larger than the sum of its proper divisors (3570152481).

8720804319 is a wasteful number, since it uses less digits than its factorization.

8720804319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640414.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 8720804319 is about 93385.2467951978. The cubic root of 8720804319 is about 2058.3482155123.

The spelling of 8720804319 in words is "eight billion, seven hundred twenty million, eight hundred four thousand, three hundred nineteen".