28962217 has 4 divisors (see below), whose sum is σ = 29037060. Its totient is φ = 28887376.

The previous prime is 28962209. The next prime is 28962229. The reversal of 28962217 is 71226982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71226982 = 2 ⋅35613491.

It can be written as a sum of positive squares in 2 ways, for example, as 6456681 + 22505536 = 2541^2 + 4744^2 .

It is a cyclic number.

It is not a de Polignac number, because 28962217 - 2³ = 28962209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28962247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36838 + ... + 37615.

It is an arithmetic number, because the mean of its divisors is an integer number (7259265).

Almost surely, 2^28962217 is an apocalyptic number.

It is an amenable number.

28962217 is a deficient number, since it is larger than the sum of its proper divisors (74843).

28962217 is an equidigital number, since it uses as much as digits as its factorization.

28962217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74842.

The product of its digits is 24192, while the sum is 37.

The square root of 28962217 is about 5381.6556002777. The cubic root of 28962217 is about 307.0981977458.

The spelling of 28962217 in words is "twenty-eight million, nine hundred sixty-two thousand, two hundred seventeen".