2640285 has 24 divisors (see below), whose sum is σ = 4777344. Its totient is φ = 1346400.

The previous prime is 2640271. The next prime is 2640289. The reversal of 2640285 is 5820462.

It is not a de Polignac number, because 2640285 - 2⁹ = 2639773 is a prime.

It is a super-2 number, since 2×2640285² = 13942209762450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁰ + 6⁷ + 4 + 0 + 2²¹ + 8⁶ + 5² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241 + ... + 2310.

It is an arithmetic number, because the mean of its divisors is an integer number (199056).

2^2640285 is an apocalyptic number.

It is an amenable number.

2640285 is a deficient number, since it is larger than the sum of its proper divisors (2137059).

2640285 is a wasteful number, since it uses less digits than its factorization.

2640285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585 (or 2582 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2640285 is about 1624.8953812477. The cubic root of 2640285 is about 138.2134378319.

The spelling of 2640285 in words is "two million, six hundred forty thousand, two hundred eighty-five".