28746229 has 8 divisors (see below), whose sum is σ = 29077688. Its totient is φ = 28416960.

The previous prime is 28746209. The next prime is 28746253. The reversal of 28746229 is 92264782.

It can be written as a sum of positive squares in 4 ways, for example, as 1965604 + 26780625 = 1402^2 + 5175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28746229 - 2⁷ = 28746101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28746191 and 28746200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28746209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43159 + ... + 43819.

It is an arithmetic number, because the mean of its divisors is an integer number (3634711).

Almost surely, 2^28746229 is an apocalyptic number.

It is an amenable number.

28746229 is a deficient number, since it is larger than the sum of its proper divisors (331459).

28746229 is a wasteful number, since it uses less digits than its factorization.

28746229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095.

The product of its digits is 96768, while the sum is 40.

The square root of 28746229 is about 5361.5509882869. The cubic root of 28746229 is about 306.3328891835.

The spelling of 28746229 in words is "twenty-eight million, seven hundred forty-six thousand, two hundred twenty-nine".