2785746990 has 96 divisors (see below), whose sum is σ = 7665744096. Its totient is φ = 645365760.

The previous prime is 2785746923. The next prime is 2785746991. The reversal of 2785746990 is 996475872.

It is a self number, because there is not a number n which added to its sum of digits gives 2785746990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2785746991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70030 + ... + 102350.

It is an arithmetic number, because the mean of its divisors is an integer number (79851501).

Almost surely, 2^2785746990 is an apocalyptic number.

2785746990 is the 43095-th pentagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2785746990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3832872048).

2785746990 is an abundant number, since it is smaller than the sum of its proper divisors (4879997106).

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

2785746990 is a wasteful number, since it uses less digits than its factorization.

2785746990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32374 (or 32361 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 57.

The square root of 2785746990 is about 52780.1761080806. The cubic root of 2785746990 is about 1407.0641241020.

It can be divided in two parts, 27857 and 46990, that added together give a palindrome (74847).

The spelling of 2785746990 in words is "two billion, seven hundred eighty-five million, seven hundred forty-six thousand, nine hundred ninety".