2720385 has 24 divisors (see below), whose sum is σ = 4892160. Its totient is φ = 1450224.

The previous prime is 2720383. The next prime is 2720387. The reversal of 2720385 is 5830272.

It is an interprime number because it is at equal distance from previous prime (2720383) and next prime (2720387).

It is not a de Polignac number, because 2720385 - 2¹ = 2720383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2720381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96 + ... + 2334.

It is an arithmetic number, because the mean of its divisors is an integer number (203840).

2^2720385 is an apocalyptic number.

It is an amenable number.

2720385 is a deficient number, since it is larger than the sum of its proper divisors (2171775).

2720385 is an equidigital number, since it uses as much as digits as its factorization.

2720385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259 (or 2247 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 2720385 is about 1649.3589663866. The cubic root of 2720385 is about 139.5972267055.

The spelling of 2720385 in words is "two million, seven hundred twenty thousand, three hundred eighty-five".