28987976 has 32 divisors (see below), whose sum is σ = 56505600. Its totient is φ = 13926720.

The previous prime is 28987963. The next prime is 28987991. The reversal of 28987976 is 67978982.

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 7 ways as a sum of consecutive naturals, for example, 44066 + ... + 44718.

It is an arithmetic number, because the mean of its divisors is an integer number (1765800).

Almost surely, 2^28987976 is an apocalyptic number.

It is an amenable number.

28987976 is a deficient number, since it is larger than the sum of its proper divisors (27517624).

28987976 is a wasteful number, since it uses less digits than its factorization.

28987976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 865 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 56.

The square root of 28987976 is about 5384.0482910167. The cubic root of 28987976 is about 307.1892151614.

The spelling of 28987976 in words is "twenty-eight million, nine hundred eighty-seven thousand, nine hundred seventy-six".