28197316 has 12 divisors (see below), whose sum is σ = 56394688. Its totient is φ = 12084552.

The previous prime is 28197289. The next prime is 28197343. The reversal of 28197316 is 61379182.

It is an interprime number because it is at equal distance from previous prime (28197289) and next prime (28197343).

28197316 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503496 + ... + 503551.

Almost surely, 2^28197316 is an apocalyptic number.

It is an amenable number.

28197316 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28197316 is a wasteful number, since it uses less digits than its factorization.

28197316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007058 (or 1007056 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 28197316 is about 5310.1144997071. The cubic root of 28197316 is about 304.3705229367.

The spelling of 28197316 in words is "twenty-eight million, one hundred ninety-seven thousand, three hundred sixteen".