2208645 has 12 divisors (see below), whose sum is σ = 3828396. Its totient is φ = 1177920.

The previous prime is 2208643. The next prime is 2208653. The reversal of 2208645 is 5468022.

It can be written as a sum of positive squares in 2 ways, for example, as 956484 + 1252161 = 978^2 + 1119^2 .

It is not a de Polignac number, because 2208645 - 2¹ = 2208643 is a prime.

It is a super-2 number, since 2×2208645² = 9756225472050, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁹ + 2¹⁹ + 0 + 8 + 6⁸ + 4⁶ + 5³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2208643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24496 + ... + 24585.

It is an arithmetic number, because the mean of its divisors is an integer number (319033).

2^2208645 is an apocalyptic number.

It is an amenable number.

2208645 is a deficient number, since it is larger than the sum of its proper divisors (1619751).

2208645 is a wasteful number, since it uses less digits than its factorization.

2208645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49092 (or 49089 counting only the distinct ones).

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

The square root of 2208645 is about 1486.1510690371. The cubic root of 2208645 is about 130.2292798017.

The spelling of 2208645 in words is "two million, two hundred eight thousand, six hundred forty-five".