28217324 has 12 divisors (see below), whose sum is σ = 49434000. Its totient is φ = 14093328.

The previous prime is 28217257. The next prime is 28217327. The reversal of 28217324 is 42371282.

It is not an unprimeable number, because it can be changed into a prime (28217327) 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, 977 + ... + 7575.

It is an arithmetic number, because the mean of its divisors is an integer number (4119500).

Almost surely, 2^28217324 is an apocalyptic number.

It is an amenable number.

28217324 is a deficient number, since it is larger than the sum of its proper divisors (21216676).

28217324 is a wasteful number, since it uses less digits than its factorization.

28217324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7672 (or 7670 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 28217324 is about 5311.9981174695. The cubic root of 28217324 is about 304.4424967562.

The spelling of 28217324 in words is "twenty-eight million, two hundred seventeen thousand, three hundred twenty-four".