28847520 has 288 divisors, whose sum is σ = 112275072. Its totient is φ = 6690816.

The previous prime is 28847471. The next prime is 28847527. The reversal of 28847520 is 2574882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

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 (28847527) 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 47 ways as a sum of consecutive naturals, for example, 430527 + ... + 430593.

It is an arithmetic number, because the mean of its divisors is an integer number (389844).

Almost surely, 2^28847520 is an apocalyptic number.

28847520 is a gapful number since it is divisible by the number (20) 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 28847520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56137536).

28847520 is an abundant number, since it is smaller than the sum of its proper divisors (83427552).

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

28847520 is a wasteful number, since it uses less digits than its factorization.

28847520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28847520 is about 5370.9887357916. The cubic root of 28847520 is about 306.6922683940.

It can be divided in two parts, 2884 and 7520, that added together give a square (10404 = 102²).

The spelling of 28847520 in words is "twenty-eight million, eight hundred forty-seven thousand, five hundred twenty".