8321783280 has 40 divisors (see below), whose sum is σ = 25797528912. Its totient is φ = 2219142144.

The previous prime is 8321783279. The next prime is 8321783333. The reversal of 8321783280 is 823871238.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17336809 + ... + 17337288.

Almost surely, 2^8321783280 is an apocalyptic number.

8321783280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8321783280 is an abundant number, since it is smaller than the sum of its proper divisors (17475745632).

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

8321783280 is a wasteful number, since it uses less digits than its factorization.

8321783280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34674113 (or 34674107 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 8321783280 is about 91223.8087343430. The cubic root of 8321783280 is about 2026.4635686847.

The spelling of 8321783280 in words is "eight billion, three hundred twenty-one million, seven hundred eighty-three thousand, two hundred eighty".