2785257980 has 12 divisors (see below), whose sum is σ = 5849041800. Its totient is φ = 1114103184.

The previous prime is 2785257973. The next prime is 2785257997. The reversal of 2785257980 is 897525872.

It is a happy number.

2785257980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 69631430 + ... + 69631469.

It is an arithmetic number, because the mean of its divisors is an integer number (487420150).

Almost surely, 2^2785257980 is an apocalyptic number.

2785257980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2785257980 is an abundant number, since it is smaller than the sum of its proper divisors (3063783820).

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

2785257980 is a wasteful number, since it uses less digits than its factorization.

2785257980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139262908 (or 139262906 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 53.

The square root of 2785257980 is about 52775.5433889600. The cubic root of 2785257980 is about 1406.9817872764.

The spelling of 2785257980 in words is "two billion, seven hundred eighty-five million, two hundred fifty-seven thousand, nine hundred eighty".