28217298 has 16 divisors (see below), whose sum is σ = 56494080. Its totient is φ = 9395856.

The previous prime is 28217257. The next prime is 28217327. The reversal of 28217298 is 89271282.

28217298 = 50⁴ + 51⁴ + ... + 53⁴.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5836 + ... + 9512.

It is an arithmetic number, because the mean of its divisors is an integer number (3530880).

Almost surely, 2^28217298 is an apocalyptic number.

28217298 is an abundant number, since it is smaller than the sum of its proper divisors (28276782).

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

28217298 is a wasteful number, since it uses less digits than its factorization.

28217298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961.

The product of its digits is 32256, while the sum is 39.

The square root of 28217298 is about 5311.9956701790. The cubic root of 28217298 is about 304.4424032498.

The spelling of 28217298 in words is "twenty-eight million, two hundred seventeen thousand, two hundred ninety-eight".