28358829 has 16 divisors (see below), whose sum is σ = 42535040. Its totient is φ = 18904428.

The previous prime is 28358809. The next prime is 28358851. The reversal of 28358829 is 92885382.

It is not a de Polignac number, because 28358829 - 2¹¹ = 28356781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28358809) 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 15 ways as a sum of consecutive naturals, for example, 4297 + ... + 8670.

It is an arithmetic number, because the mean of its divisors is an integer number (2658440).

Almost surely, 2^28358829 is an apocalyptic number.

It is an amenable number.

28358829 is a deficient number, since it is larger than the sum of its proper divisors (14176211).

28358829 is an frugal number, since it uses more digits than its factorization.

28358829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12988 (or 12970 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 28358829 is about 5325.3008365725. The cubic root of 28358829 is about 304.9505572456.

It can be divided in two parts, 2835 and 8829, that added together give a square (11664 = 108²).

The spelling of 28358829 in words is "twenty-eight million, three hundred fifty-eight thousand, eight hundred twenty-nine".