2783787980 has 48 divisors (see below), whose sum is σ = 6135562944. Its totient is φ = 1058914560.

The previous prime is 2783787971. The next prime is 2783787989. The reversal of 2783787980 is 897873872.

It is an interprime number because it is at equal distance from previous prime (2783787971) and next prime (2783787989).

It is not an unprimeable number, because it can be changed into a prime (2783787989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62090 + ... + 97070.

It is an arithmetic number, because the mean of its divisors is an integer number (127824228).

Almost surely, 2^2783787980 is an apocalyptic number.

2783787980 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 2783787980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3067781472).

2783787980 is an abundant number, since it is smaller than the sum of its proper divisors (3351774964).

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

2783787980 is a wasteful number, since it uses less digits than its factorization.

2783787980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35186 (or 35184 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 59.

The square root of 2783787980 is about 52761.6146454977. The cubic root of 2783787980 is about 1406.7342186836.

The spelling of 2783787980 in words is "two billion, seven hundred eighty-three million, seven hundred eighty-seven thousand, nine hundred eighty".