28318752 has 144 divisors (see below), whose sum is σ = 100481472. Its totient is φ = 7349760.

The previous prime is 28318729. The next prime is 28318757. The reversal of 28318752 is 25781382.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28318757) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21538 + ... + 22814.

It is an arithmetic number, because the mean of its divisors is an integer number (697788).

Almost surely, 2^28318752 is an apocalyptic number.

28318752 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28318752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50240736).

28318752 is an abundant number, since it is smaller than the sum of its proper divisors (72162720).

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

28318752 is a wasteful number, since it uses less digits than its factorization.

28318752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311 (or 1300 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 28318752 is about 5321.5366201878. The cubic root of 28318752 is about 304.8068363937.

The spelling of 28318752 in words is "twenty-eight million, three hundred eighteen thousand, seven hundred fifty-two".