2781792 has 72 divisors (see below), whose sum is σ = 8530704. Its totient is φ = 854784.

The previous prime is 2781749. The next prime is 2781797. The reversal of 2781792 is 2971872.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3373 + ... + 4115.

It is an arithmetic number, because the mean of its divisors is an integer number (118482).

2^2781792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2781792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4265352).

2781792 is an abundant number, since it is smaller than the sum of its proper divisors (5748912).

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

2781792 is a wasteful number, since it uses less digits than its factorization.

2781792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 761 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2781792 is about 1667.8704985700. The cubic root of 2781792 is about 140.6397928142.

The spelling of 2781792 in words is "two million, seven hundred eighty-one thousand, seven hundred ninety-two".