28475293 has 12 divisors (see below), whose sum is σ = 35771680. Its totient is φ = 22187880.

The previous prime is 28475287. The next prime is 28475327. The reversal of 28475293 is 39257482.

It is not a de Polignac number, because 28475293 - 2⁵ = 28475261 is a prime.

It is a super-2 number, since 2×28475293² = 1621684622871698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28475203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15963 + ... + 17656.

Almost surely, 2^28475293 is an apocalyptic number.

It is an amenable number.

28475293 is a deficient number, since it is larger than the sum of its proper divisors (7296387).

28475293 is a wasteful number, since it uses less digits than its factorization.

28475293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33648 (or 33637 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 28475293 is about 5336.2246017198. The cubic root of 28475293 is about 305.3674439188.

The spelling of 28475293 in words is "twenty-eight million, four hundred seventy-five thousand, two hundred ninety-three".