28069229 has 8 divisors (see below), whose sum is σ = 29057280. Its totient is φ = 27086400.

The previous prime is 28069183. The next prime is 28069259. The reversal of 28069229 is 92296082.

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 28069229 - 2⁸ = 28068973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28069192 and 28069201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28069259) 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, 11909 + ... + 14069.

It is an arithmetic number, because the mean of its divisors is an integer number (3632160).

Almost surely, 2^28069229 is an apocalyptic number.

It is an amenable number.

28069229 is a deficient number, since it is larger than the sum of its proper divisors (988051).

28069229 is a wasteful number, since it uses less digits than its factorization.

28069229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 28069229 is about 5298.0401093234. The cubic root of 28069229 is about 303.9089531420.

The spelling of 28069229 in words is "twenty-eight million, sixty-nine thousand, two hundred twenty-nine".