28087768 has 16 divisors (see below), whose sum is σ = 52751160. Its totient is φ = 14020800.

The previous prime is 28087753. The next prime is 28087789. The reversal of 28087768 is 86778082.

It is a super-2 number, since 2×28087768² = 1577845422443648, which contains 22 as substring.

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, 2988 + ... + 8068.

Almost surely, 2^28087768 is an apocalyptic number.

It is an amenable number.

28087768 is a deficient number, since it is larger than the sum of its proper divisors (24663392).

28087768 is a wasteful number, since it uses less digits than its factorization.

28087768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5778 (or 5774 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 28087768 is about 5299.7894297793. The cubic root of 28087768 is about 303.9758464189.

The spelling of 28087768 in words is "twenty-eight million, eighty-seven thousand, seven hundred sixty-eight".