2028731880 has 128 divisors (see below), whose sum is σ = 7087046400. Its totient is φ = 454950912.

The previous prime is 2028731879. The next prime is 2028731921. The reversal of 2028731880 is 881378202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21736 + ... + 67304.

It is an arithmetic number, because the mean of its divisors is an integer number (55367550).

Almost surely, 2^2028731880 is an apocalyptic number.

2028731880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2028731880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3543523200).

2028731880 is an abundant number, since it is smaller than the sum of its proper divisors (5058314520).

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

2028731880 is a wasteful number, since it uses less digits than its factorization.

2028731880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45643 (or 45639 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 2028731880 is about 45041.4462467625. The cubic root of 2028731880 is about 1265.9257036080.

The spelling of 2028731880 in words is "two billion, twenty-eight million, seven hundred thirty-one thousand, eight hundred eighty".