2180867328 has 90 divisors (see below), whose sum is σ = 6503013594. Its totient is φ = 726948864.

The previous prime is 2180867323. The next prime is 2180867333. The reversal of 2180867328 is 8237680812.

It is an interprime number because it is at equal distance from previous prime (2180867323) and next prime (2180867333).

It can be written as a sum of positive squares in only one way, i.e., 1602561024 + 578306304 = 40032^2 + 24048^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180867323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 31851 + ... + 73322.

Almost surely, 2^2180867328 is an apocalyptic number.

It is an amenable number.

2180867328 is an abundant number, since it is smaller than the sum of its proper divisors (4322146266).

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

2180867328 is an equidigital number, since it uses as much as digits as its factorization.

2180867328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105201 (or 105178 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 2180867328 is about 46699.7572584698. The cubic root of 2180867328 is about 1296.8101929917.

The spelling of 2180867328 in words is "two billion, one hundred eighty million, eight hundred sixty-seven thousand, three hundred twenty-eight".