28111488 has 64 divisors (see below), whose sum is σ = 78621600. Its totient is φ = 8875008.

The previous prime is 28111487. The next prime is 28111537. The reversal of 28111488 is 88411182.

It is a tau number, because it is divible by the number of its divisors (64).

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

It is not an unprimeable number, because it can be changed into a prime (28111487) 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, 5370 + ... + 9222.

Almost surely, 2^28111488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28111488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39310800).

28111488 is an abundant number, since it is smaller than the sum of its proper divisors (50510112).

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

28111488 is a wasteful number, since it uses less digits than its factorization.

28111488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889 (or 3877 counting only the distinct ones).

The product of its digits is 4096, while the sum is 33.

The square root of 28111488 is about 5302.0267822786. The cubic root of 28111488 is about 304.0613911103.

The spelling of 28111488 in words is "twenty-eight million, one hundred eleven thousand, four hundred eighty-eight".