28464217 has 4 divisors (see below), whose sum is σ = 28513296. Its totient is φ = 28415140.

The previous prime is 28464203. The next prime is 28464221. The reversal of 28464217 is 71246482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28464217 - 2¹¹ = 28462169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28464017) 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, 23659 + ... + 24832.

It is an arithmetic number, because the mean of its divisors is an integer number (7128324).

Almost surely, 2^28464217 is an apocalyptic number.

It is an amenable number.

28464217 is a deficient number, since it is larger than the sum of its proper divisors (49079).

28464217 is an equidigital number, since it uses as much as digits as its factorization.

28464217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49078.

The product of its digits is 21504, while the sum is 34.

The square root of 28464217 is about 5335.1866883925. The cubic root of 28464217 is about 305.3278459834.

The spelling of 28464217 in words is "twenty-eight million, four hundred sixty-four thousand, two hundred seventeen".