2791720 has 32 divisors (see below), whose sum is σ = 6376320. Its totient is φ = 1099840.

The previous prime is 2791709. The next prime is 2791721. The reversal of 2791720 is 271972.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2791721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349 + ... + 3331.

It is an arithmetic number, because the mean of its divisors is an integer number (199260).

2^2791720 is an apocalyptic number.

2791720 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 2791720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3188160).

2791720 is an abundant number, since it is smaller than the sum of its proper divisors (3584600).

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

2791720 is a wasteful number, since it uses less digits than its factorization.

2791720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 2791720 is about 1670.8440980534. The cubic root of 2791720 is about 140.8069050074.

The spelling of 2791720 in words is "two million, seven hundred ninety-one thousand, seven hundred twenty".