28029293 has 4 divisors (see below), whose sum is σ = 28039968. Its totient is φ = 28018620.

The previous prime is 28029289. The next prime is 28029347. The reversal of 28029293 is 39292082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 39292082 = 2 ⋅19646041.

It is a cyclic number.

It is not a de Polignac number, because 28029293 - 2² = 28029289 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 (28029233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658 + ... + 7668.

It is an arithmetic number, because the mean of its divisors is an integer number (7009992).

Almost surely, 2^28029293 is an apocalyptic number.

It is an amenable number.

28029293 is a deficient number, since it is larger than the sum of its proper divisors (10675).

28029293 is an equidigital number, since it uses as much as digits as its factorization.

28029293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10674.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 28029293 is about 5294.2698268978. The cubic root of 28029293 is about 303.7647540915.

The spelling of 28029293 in words is "twenty-eight million, twenty-nine thousand, two hundred ninety-three".