28287976 has 16 divisors (see below), whose sum is σ = 55346400. Its totient is φ = 13528944.

The previous prime is 28287929. The next prime is 28288019. The reversal of 28287976 is 67978282.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76686 + ... + 77053.

It is an arithmetic number, because the mean of its divisors is an integer number (3459150).

Almost surely, 2^28287976 is an apocalyptic number.

It is an amenable number.

28287976 is a deficient number, since it is larger than the sum of its proper divisors (27058424).

28287976 is a wasteful number, since it uses less digits than its factorization.

28287976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153768 (or 153764 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 28287976 is about 5318.6441881367. The cubic root of 28287976 is about 304.6963779539.

The spelling of 28287976 in words is "twenty-eight million, two hundred eighty-seven thousand, nine hundred seventy-six".