2785669920 has 576 divisors, whose sum is σ = 11170535040. Its totient is φ = 642816000.

The previous prime is 2785669919. The next prime is 2785669927. The reversal of 2785669920 is 299665872.

2785669920 is a `hidden beast` number, since 2 + 78 + 566 + 9 + 9 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2785669927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 45666690 + ... + 45666750.

It is an arithmetic number, because the mean of its divisors is an integer number (19393290).

Almost surely, 2^2785669920 is an apocalyptic number.

2785669920 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 2785669920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5585267520).

2785669920 is an abundant number, since it is smaller than the sum of its proper divisors (8384865120).

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

2785669920 is a wasteful number, since it uses less digits than its factorization.

2785669920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 2785669920 is about 52779.4459993661. The cubic root of 2785669920 is about 1407.0511481172.

The spelling of 2785669920 in words is "two billion, seven hundred eighty-five million, six hundred sixty-nine thousand, nine hundred twenty".