28824720 has 40 divisors (see below), whose sum is σ = 89357376. Its totient is φ = 7686528.

The previous prime is 28824713. The next prime is 28824721. The reversal of 28824720 is 2742882.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (28824721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59812 + ... + 60291.

Almost surely, 2^28824720 is an apocalyptic number.

28824720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28824720 is an abundant number, since it is smaller than the sum of its proper divisors (60532656).

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

28824720 is a wasteful number, since it uses less digits than its factorization.

28824720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120119 (or 120113 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 28824720 is about 5368.8658020107. The cubic root of 28824720 is about 306.6114477347.

The spelling of 28824720 in words is "twenty-eight million, eight hundred twenty-four thousand, seven hundred twenty".