2905216 has 16 divisors (see below), whose sum is σ = 5787990. Its totient is φ = 1452544.

The previous prime is 2905213. The next prime is 2905223. The reversal of 2905216 is 6125092.

It can be written as a sum of positive squares in only one way, i.e., 2903616 + 1600 = 1704^2 + 40^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2905213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11221 + ... + 11476.

2^2905216 is an apocalyptic number.

It is an amenable number.

2905216 is a deficient number, since it is larger than the sum of its proper divisors (2882774).

2905216 is an equidigital number, since it uses as much as digits as its factorization.

2905216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22711 (or 22699 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2905216 is about 1704.4694189102. The cubic root of 2905216 is about 142.6897605301.

The spelling of 2905216 in words is "two million, nine hundred five thousand, two hundred sixteen".