2840215 has 16 divisors (see below), whose sum is σ = 4101120. Its totient is φ = 1844640.

The previous prime is 2840209. The next prime is 2840237. The reversal of 2840215 is 5120482.

2840215 = 75² + 76² + ... + 207².

It is not a de Polignac number, because 2840215 - 2⁵ = 2840183 is a prime.

It is an Ulam number.

2840215 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1471 + ... + 2800.

It is an arithmetic number, because the mean of its divisors is an integer number (256320).

2^2840215 is an apocalyptic number.

2840215 is a deficient number, since it is larger than the sum of its proper divisors (1260905).

2840215 is a wasteful number, since it uses less digits than its factorization.

2840215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2840215 is about 1685.2937429422. The cubic root of 2840215 is about 141.6175485236.

Adding to 2840215 its reverse (5120482), we get a palindrome (7960697).

The spelling of 2840215 in words is "two million, eight hundred forty thousand, two hundred fifteen".