28412217 has 12 divisors (see below), whose sum is σ = 41736240. Its totient is φ = 18620088.

The previous prime is 28412183. The next prime is 28412249. The reversal of 28412217 is 71221482.

28412217 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 28412217 - 2⁸ = 28411961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28411217) 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, 26223 + ... + 27284.

It is an arithmetic number, because the mean of its divisors is an integer number (3478020).

Almost surely, 2^28412217 is an apocalyptic number.

It is an amenable number.

28412217 is a deficient number, since it is larger than the sum of its proper divisors (13324023).

28412217 is a wasteful number, since it uses less digits than its factorization.

28412217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53572 (or 53569 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 28412217 is about 5330.3111541448. The cubic root of 28412217 is about 305.1418027352.

Adding to 28412217 its reverse (71221482), we get a palindrome (99633699).

The spelling of 28412217 in words is "twenty-eight million, four hundred twelve thousand, two hundred seventeen".