28824540 has 24 divisors (see below), whose sum is σ = 80708880. Its totient is φ = 7686528.

The previous prime is 28824533. The next prime is 28824557. The reversal of 28824540 is 4542882.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240145 + ... + 240264.

It is an arithmetic number, because the mean of its divisors is an integer number (3362870).

Almost surely, 2^28824540 is an apocalyptic number.

28824540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28824540 is an abundant number, since it is smaller than the sum of its proper divisors (51884340).

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

28824540 is a wasteful number, since it uses less digits than its factorization.

28824540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480421 (or 480419 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 28824540 is about 5368.8490386674. The cubic root of 28824540 is about 306.6108095074.

The spelling of 28824540 in words is "twenty-eight million, eight hundred twenty-four thousand, five hundred forty".