28087968 has 48 divisors (see below), whose sum is σ = 76942656. Its totient is φ = 8954880.

The previous prime is 28087967. The next prime is 28087973. The reversal of 28087968 is 86978082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-5 number, since 5×28087968⁵ (a number of 38 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (28087967) by changing a digit.

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, 4153 + ... + 8568.

It is an arithmetic number, because the mean of its divisors is an integer number (1602972).

Almost surely, 2^28087968 is an apocalyptic number.

It is an amenable number.

28087968 is an abundant number, since it is smaller than the sum of its proper divisors (48854688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28087968 is a wasteful number, since it uses less digits than its factorization.

28087968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12757 (or 12749 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 28087968 is about 5299.8082984199. The cubic root of 28087968 is about 303.9765679077.

The spelling of 28087968 in words is "twenty-eight million, eighty-seven thousand, nine hundred sixty-eight".