2180868928 has 28 divisors (see below), whose sum is σ = 4945900192. Its totient is φ = 934657920.

The previous prime is 2180868869. The next prime is 2180868931. The reversal of 2180868928 is 8298680812.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×2180868928² = 9512378562231738368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2433558 + ... + 2434453.

Almost surely, 2^2180868928 is an apocalyptic number.

2180868928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2180868928 is an abundant number, since it is smaller than the sum of its proper divisors (2765031264).

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

2180868928 is an equidigital number, since it uses as much as digits as its factorization.

2180868928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4868030 (or 4868020 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 52.

The square root of 2180868928 is about 46699.7743891767. The cubic root of 2180868928 is about 1296.8105101278.

The spelling of 2180868928 in words is "two billion, one hundred eighty million, eight hundred sixty-eight thousand, nine hundred twenty-eight".