28824729 has 16 divisors (see below), whose sum is σ = 40726080. Its totient is φ = 18083520.

The previous prime is 28824721. The next prime is 28824751. The reversal of 28824729 is 92742882.

It is not a de Polignac number, because 28824729 - 2³ = 28824721 is a prime.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7339 + ... + 10559.

It is an arithmetic number, because the mean of its divisors is an integer number (2545380).

Almost surely, 2^28824729 is an apocalyptic number.

It is an amenable number.

28824729 is a deficient number, since it is larger than the sum of its proper divisors (11901351).

28824729 is a wasteful number, since it uses less digits than its factorization.

28824729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400.

The product of its digits is 129024, while the sum is 42.

The square root of 28824729 is about 5368.8666401765. The cubic root of 28824729 is about 306.6114796460.

The spelling of 28824729 in words is "twenty-eight million, eight hundred twenty-four thousand, seven hundred twenty-nine".