28280169 has 12 divisors (see below), whose sum is σ = 40936896. Its totient is φ = 18812952.

The previous prime is 28280141. The next prime is 28280177. The reversal of 28280169 is 96108282.

It is not a de Polignac number, because 28280169 - 2⁸ = 28279913 is a prime.

It is a super-2 number, since 2×28280169² = 1599535917337122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28280069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1404 + ... + 7650.

It is an arithmetic number, because the mean of its divisors is an integer number (3411408).

Almost surely, 2^28280169 is an apocalyptic number.

It is an amenable number.

28280169 is a deficient number, since it is larger than the sum of its proper divisors (12656727).

28280169 is a wasteful number, since it uses less digits than its factorization.

28280169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756 (or 6753 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 28280169 is about 5317.9102098475. The cubic root of 28280169 is about 304.6683450364.

The spelling of 28280169 in words is "twenty-eight million, two hundred eighty thousand, one hundred sixty-nine".