28292169 has 4 divisors (see below), whose sum is σ = 37722896. Its totient is φ = 18861444.

The previous prime is 28292153. The next prime is 28292183. The reversal of 28292169 is 96129282.

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.

It is not a de Polignac number, because 28292169 - 2⁴ = 28292153 is a prime.

It is a super-2 number, since 2×28292169² = 1600893653449122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28292189) 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, 4715359 + ... + 4715364.

It is an arithmetic number, because the mean of its divisors is an integer number (9430724).

Almost surely, 2^28292169 is an apocalyptic number.

It is an amenable number.

28292169 is a deficient number, since it is larger than the sum of its proper divisors (9430727).

28292169 is an equidigital number, since it uses as much as digits as its factorization.

28292169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9430726.

The product of its digits is 31104, while the sum is 39.

The square root of 28292169 is about 5319.0383529356. The cubic root of 28292169 is about 304.7114318033.

The spelling of 28292169 in words is "twenty-eight million, two hundred ninety-two thousand, one hundred sixty-nine".