2720845 has 8 divisors (see below), whose sum is σ = 3281760. Its totient is φ = 2165520.

The previous prime is 2720843. The next prime is 2720849. The reversal of 2720845 is 5480272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2720845 - 2¹ = 2720843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720843) 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, 235 + ... + 2344.

It is an arithmetic number, because the mean of its divisors is an integer number (410220).

2^2720845 is an apocalyptic number.

It is an amenable number.

2720845 is a deficient number, since it is larger than the sum of its proper divisors (560915).

2720845 is a wasteful number, since it uses less digits than its factorization.

2720845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 2720845 is about 1649.4984086079. The cubic root of 2720845 is about 139.6050945998.

The spelling of 2720845 in words is "two million, seven hundred twenty thousand, eight hundred forty-five".