28788032 has 56 divisors (see below), whose sum is σ = 70323456. Its totient is φ = 11386368.

The previous prime is 28788007. The next prime is 28788037. The reversal of 28788032 is 23088782.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28788037) 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, 3353 + ... + 8295.

It is an arithmetic number, because the mean of its divisors is an integer number (1255776).

Almost surely, 2^28788032 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 28788032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35161728).

28788032 is an abundant number, since it is smaller than the sum of its proper divisors (41535424).

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

28788032 is a wasteful number, since it uses less digits than its factorization.

28788032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975 (or 4965 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 28788032 is about 5365.4479775691. The cubic root of 28788032 is about 306.4813078558.

The spelling of 28788032 in words is "twenty-eight million, seven hundred eighty-eight thousand, thirty-two".