28709104 has 20 divisors (see below), whose sum is σ = 56808864. Its totient is φ = 14048768.

The previous prime is 28709071. The next prime is 28709113. The reversal of 28709104 is 40190782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18337 + ... + 19840.

Almost surely, 2^28709104 is an apocalyptic number.

It is an amenable number.

28709104 is a deficient number, since it is larger than the sum of its proper divisors (28099760).

28709104 is a wasteful number, since it uses less digits than its factorization.

28709104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38232 (or 38226 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 28709104 is about 5358.0877185802. The cubic root of 28709104 is about 306.2009587445.

Adding to 28709104 its reverse (40190782), we get a palindrome (68899886).

The spelling of 28709104 in words is "twenty-eight million, seven hundred nine thousand, one hundred four".