2724385 has 4 divisors (see below), whose sum is σ = 3269268. Its totient is φ = 2179504.

The previous prime is 2724383. The next prime is 2724389. The reversal of 2724385 is 5834272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1096209 + 1628176 = 1047^2 + 1276^2 .

It is a cyclic number.

It is not a de Polignac number, because 2724385 - 2¹ = 2724383 is a prime.

It is a Duffinian number.

2724385 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2724383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272434 + ... + 272443.

It is an arithmetic number, because the mean of its divisors is an integer number (817317).

2^2724385 is an apocalyptic number.

It is an amenable number.

2724385 is a deficient number, since it is larger than the sum of its proper divisors (544883).

2724385 is an equidigital number, since it uses as much as digits as its factorization.

2724385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544882.

The product of its digits is 13440, while the sum is 31.

The square root of 2724385 is about 1650.5711132817. The cubic root of 2724385 is about 139.6656135268.

The spelling of 2724385 in words is "two million, seven hundred twenty-four thousand, three hundred eighty-five".