28727829 has 24 divisors (see below), whose sum is σ = 47043360. Its totient is φ = 16746912.

The previous prime is 28727819. The next prime is 28727837. The reversal of 28727829 is 92872782.

It is a happy number.

It is not a de Polignac number, because 28727829 - 2⁴ = 28727813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28727819) 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 23 ways as a sum of consecutive naturals, for example, 4239 + ... + 8684.

It is an arithmetic number, because the mean of its divisors is an integer number (1960140).

Almost surely, 2^28727829 is an apocalyptic number.

It is an amenable number.

28727829 is a deficient number, since it is larger than the sum of its proper divisors (18315531).

28727829 is a wasteful number, since it uses less digits than its factorization.

28727829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12961 (or 12958 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 28727829 is about 5359.8347922301. The cubic root of 28727829 is about 306.2675156440.

It can be divided in two parts, 2872 and 7829, that added together give a palindrome (10701).

The spelling of 28727829 in words is "twenty-eight million, seven hundred twenty-seven thousand, eight hundred twenty-nine".