28333417 has 18 divisors (see below), whose sum is σ = 33790398. Its totient is φ = 23683968.

The previous prime is 28333399. The next prime is 28333423. The reversal of 28333417 is 71433382.

It can be written as a sum of positive squares in 3 ways, for example, as 254016 + 28079401 = 504^2 + 5299^2 .

It is not a de Polignac number, because 28333417 - 2⁷ = 28333289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28333477) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 318309 + ... + 318397.

Almost surely, 2^28333417 is an apocalyptic number.

It is an amenable number.

28333417 is a deficient number, since it is larger than the sum of its proper divisors (5456981).

28333417 is an frugal number, since it uses more digits than its factorization.

28333417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 169 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 28333417 is about 5322.9143333328. The cubic root of 28333417 is about 304.8594425358.

Adding to 28333417 its reverse (71433382), we get a palindrome (99766799).

The spelling of 28333417 in words is "twenty-eight million, three hundred thirty-three thousand, four hundred seventeen".