28217344 has 39 divisors (see below), whose sum is σ = 57115843. Its totient is φ = 13938688.

The previous prime is 28217327. The next prime is 28217363. The reversal of 28217344 is 44371282.

The square root of 28217344 is 5312.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 339927 + ... + 340009.

Almost surely, 2^28217344 is an apocalyptic number.

28217344 is the 5312-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28217344

28217344 is an abundant number, since it is smaller than the sum of its proper divisors (28898499).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28217344 is an frugal number, since it uses more digits than its factorization.

28217344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 85 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The cubic root of 28217344 is about 304.4425686843.

It can be divided in two parts, 28217 and 344, that added together give a 4-th power (28561 = 13⁴).

The spelling of 28217344 in words is "twenty-eight million, two hundred seventeen thousand, three hundred forty-four".