28709692 has 12 divisors (see below), whose sum is σ = 54809496. Its totient is φ = 13049840.

The previous prime is 28709687. The next prime is 28709699. The reversal of 28709692 is 29690782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28709699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326203 + ... + 326290.

It is an arithmetic number, because the mean of its divisors is an integer number (4567458).

Almost surely, 2^28709692 is an apocalyptic number.

28709692 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28709692 is a deficient number, since it is larger than the sum of its proper divisors (26099804).

28709692 is a wasteful number, since it uses less digits than its factorization.

28709692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652508 (or 652506 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 28709692 is about 5358.1425886215. The cubic root of 28709692 is about 306.2030491956.

The spelling of 28709692 in words is "twenty-eight million, seven hundred nine thousand, six hundred ninety-two".