28293669 has 12 divisors (see below), whose sum is σ = 42187392. Its totient is φ = 18253800.

The previous prime is 28293667. The next prime is 28293673. The reversal of 28293669 is 96639282.

28293669 is a `hidden beast` number, since 282 + 9 + 366 + 9 = 666.

It is not a de Polignac number, because 28293669 - 2¹ = 28293667 is a prime.

It is a super-2 number, since 2×28293669² = 1601063410963122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28293667) 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, 50427 + ... + 50984.

It is an arithmetic number, because the mean of its divisors is an integer number (3515616).

Almost surely, 2^28293669 is an apocalyptic number.

It is an amenable number.

28293669 is a deficient number, since it is larger than the sum of its proper divisors (13893723).

28293669 is a wasteful number, since it uses less digits than its factorization.

28293669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101448 (or 101445 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 28293669 is about 5319.1793539981. The cubic root of 28293669 is about 304.7168167925.

The spelling of 28293669 in words is "twenty-eight million, two hundred ninety-three thousand, six hundred sixty-nine".