2785028880 has 80 divisors (see below), whose sum is σ = 8677123200. Its totient is φ = 738929664.

The previous prime is 2785028867. The next prime is 2785028923. The reversal of 2785028880 is 888205872.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18604 + ... + 76916.

It is an arithmetic number, because the mean of its divisors is an integer number (108464040).

Almost surely, 2^2785028880 is an apocalyptic number.

2785028880 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 2785028880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4338561600).

2785028880 is an abundant number, since it is smaller than the sum of its proper divisors (5892094320).

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

2785028880 is a wasteful number, since it uses less digits than its factorization.

2785028880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58528 (or 58522 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 48.

The square root of 2785028880 is about 52773.3728313815. The cubic root of 2785028880 is about 1406.9432093579.

The spelling of 2785028880 in words is "two billion, seven hundred eighty-five million, twenty-eight thousand, eight hundred eighty".