28871316 has 42 divisors (see below), whose sum is σ = 75760202. Its totient is φ = 9622800.

The previous prime is 28871309. The next prime is 28871329. The reversal of 28871316 is 61317882.

It can be written as a sum of positive squares in only one way, i.e., 28579716 + 291600 = 5346^2 + 540^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent 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 13 ways as a sum of consecutive naturals, for example, 2035 + ... + 7866.

Almost surely, 2^28871316 is an apocalyptic number.

It is an amenable number.

28871316 is an abundant number, since it is smaller than the sum of its proper divisors (46888886).

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

28871316 is an equidigital number, since it uses as much as digits as its factorization.

28871316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9923 (or 9906 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 28871316 is about 5373.2035137337. The cubic root of 28871316 is about 306.7765742366.

The spelling of 28871316 in words is "twenty-eight million, eight hundred seventy-one thousand, three hundred sixteen".