28264229 has 16 divisors (see below), whose sum is σ = 34704000. Its totient is φ = 22946112.

The previous prime is 28264207. The next prime is 28264237. The reversal of 28264229 is 92246282.

It is not a de Polignac number, because 28264229 - 2²⁰ = 27215653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28263229) 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, 4349 + ... + 8685.

It is an arithmetic number, because the mean of its divisors is an integer number (2169000).

Almost surely, 2^28264229 is an apocalyptic number.

It is an amenable number.

28264229 is a deficient number, since it is larger than the sum of its proper divisors (6439771).

28264229 is an equidigital number, since it uses as much as digits as its factorization.

28264229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377 (or 4363 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 28264229 is about 5316.4112895825. The cubic root of 28264229 is about 304.6110925952.

The spelling of 28264229 in words is "twenty-eight million, two hundred sixty-four thousand, two hundred twenty-nine".