28887316 has 6 divisors (see below), whose sum is σ = 50552810. Its totient is φ = 14443656.

The previous prime is 28887307. The next prime is 28887337. The reversal of 28887316 is 61378882.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 9120400 = 4446^2 + 3020^2 .

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 as a sum of consecutive naturals, namely, 3610911 + ... + 3610918.

Almost surely, 2^28887316 is an apocalyptic number.

It is an amenable number.

28887316 is a deficient number, since it is larger than the sum of its proper divisors (21665494).

28887316 is a wasteful number, since it uses less digits than its factorization.

28887316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7221833 (or 7221831 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 28887316 is about 5374.6921772321. The cubic root of 28887316 is about 306.8332339186.

The spelling of 28887316 in words is "twenty-eight million, eight hundred eighty-seven thousand, three hundred sixteen".