28724024 has 16 divisors (see below), whose sum is σ = 61551600. Its totient is φ = 12310272.

The previous prime is 28724009. The next prime is 28724027. The reversal of 28724024 is 42042782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28724027) 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 3 ways as a sum of consecutive naturals, for example, 256409 + ... + 256520.

It is an arithmetic number, because the mean of its divisors is an integer number (3846975).

Almost surely, 2^28724024 is an apocalyptic number.

It is an amenable number.

28724024 is an abundant number, since it is smaller than the sum of its proper divisors (32827576).

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

28724024 is a wasteful number, since it uses less digits than its factorization.

28724024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512942 (or 512938 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 28724024 is about 5359.4798255055. The cubic root of 28724024 is about 306.2539933396.

The spelling of 28724024 in words is "twenty-eight million, seven hundred twenty-four thousand, twenty-four".