28488288 has 24 divisors (see below), whose sum is σ = 74782008. Its totient is φ = 9496064.

The previous prime is 28488247. The next prime is 28488289. The reversal of 28488288 is 88288482.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28488289) 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 3 ways as a sum of consecutive naturals, for example, 148281 + ... + 148472.

It is an arithmetic number, because the mean of its divisors is an integer number (3115917).

Almost surely, 2^28488288 is an apocalyptic number.

It is an amenable number.

28488288 is an abundant number, since it is smaller than the sum of its proper divisors (46293720).

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

28488288 is a wasteful number, since it uses less digits than its factorization.

28488288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296766 (or 296758 counting only the distinct ones).

The product of its digits is 524288, while the sum is 48.

The square root of 28488288 is about 5337.4420839949. The cubic root of 28488288 is about 305.4138894044.

The spelling of 28488288 in words is "twenty-eight million, four hundred eighty-eight thousand, two hundred eighty-eight".