2785445872 has 80 divisors (see below), whose sum is σ = 6032185344. Its totient is φ = 1235360000.

The previous prime is 2785445863. The next prime is 2785445879.

2785445872 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2785445879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1260993 + ... + 1263199.

Almost surely, 2^2785445872 is an apocalyptic number.

2785445872 is a gapful number since it is divisible by the number (22) 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 2785445872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3016092672).

2785445872 is an abundant number, since it is smaller than the sum of its proper divisors (3246739472).

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

2785445872 is a wasteful number, since it uses less digits than its factorization.

2785445872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2392 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 52.

The square root of 2785445872 is about 52777.3234637756. The cubic root of 2785445872 is about 1407.0134246423.

The spelling of 2785445872 in words is "two billion, seven hundred eighty-five million, four hundred forty-five thousand, eight hundred seventy-two".