28732480 has 112 divisors (see below), whose sum is σ = 79589376. Its totient is φ = 9676800.

The previous prime is 28732477. The next prime is 28732507. The reversal of 28732480 is 8423782.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 226177 + ... + 226303.

Almost surely, 2^28732480 is an apocalyptic number.

28732480 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 28732480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39794688).

28732480 is an abundant number, since it is smaller than the sum of its proper divisors (50856896).

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

28732480 is a wasteful number, since it uses less digits than its factorization.

28732480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28732480 is about 5360.2686499839. The cubic root of 28732480 is about 306.2840428629.

The spelling of 28732480 in words is "twenty-eight million, seven hundred thirty-two thousand, four hundred eighty".