28988312 has 16 divisors (see below), whose sum is σ = 55679400. Its totient is φ = 14140480.

The previous prime is 28988299. The next prime is 28988347. The reversal of 28988312 is 21388982.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 28988312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43862 + ... + 44517.

Almost surely, 2^28988312 is an apocalyptic number.

It is an amenable number.

28988312 is a deficient number, since it is larger than the sum of its proper divisors (26691088).

28988312 is a wasteful number, since it uses less digits than its factorization.

28988312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88426 (or 88422 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 28988312 is about 5384.0794942125. The cubic root of 28988312 is about 307.1904020348.

The spelling of 28988312 in words is "twenty-eight million, nine hundred eighty-eight thousand, three hundred twelve".