2179864320 has 72 divisors (see below), whose sum is σ = 6961953936. Its totient is φ = 581296128.

The previous prime is 2179864279. The next prime is 2179864331. The reversal of 2179864320 is 234689712.

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, 279997 + ... + 287676.

Almost surely, 2^2179864320 is an apocalyptic number.

2179864320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2179864320 is an abundant number, since it is smaller than the sum of its proper divisors (4782089616).

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

2179864320 is an equidigital number, since it uses as much as digits as its factorization.

2179864320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567697 (or 567683 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 2179864320 is about 46689.0171239447. The cubic root of 2179864320 is about 1296.6113561288.

The spelling of 2179864320 in words is "two billion, one hundred seventy-nine million, eight hundred sixty-four thousand, three hundred twenty".