2643385 has 8 divisors (see below), whose sum is σ = 3187080. Its totient is φ = 2104704.

The previous prime is 2643383. The next prime is 2643397. The reversal of 2643385 is 5833462.

2643385 = T₁₃₂₆ + T₁₃₂₇ + T₁₃₂₈.

2643385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 41616 + 2601769 = 204^2 + 1613^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2643385 - 2¹ = 2643383 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 6³ + 4¹⁰ + 3² + 3¹³ + 8 + 5³ .

It is not an unprimeable number, because it can be changed into a prime (2643383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31 + ... + 2299.

It is an arithmetic number, because the mean of its divisors is an integer number (398385).

2^2643385 is an apocalyptic number.

2643385 is the 1328-th centered triangular number.

It is an amenable number.

2643385 is a deficient number, since it is larger than the sum of its proper divisors (543695).

2643385 is a wasteful number, since it uses less digits than its factorization.

2643385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507.

The product of its digits is 17280, while the sum is 31.

The square root of 2643385 is about 1625.8490089796. The cubic root of 2643385 is about 138.2675095298.

The spelling of 2643385 in words is "two million, six hundred forty-three thousand, three hundred eighty-five".