28704106 has 8 divisors (see below), whose sum is σ = 43080804. Its totient is φ = 14343840.

The previous prime is 28704101. The next prime is 28704107. The reversal of 28704106 is 60140782.

It can be written as a sum of positive squares in 2 ways, for example, as 19758025 + 8946081 = 4445^2 + 2991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28704101) 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 3 ways as a sum of consecutive naturals, for example, 2196 + ... + 7888.

Almost surely, 2^28704106 is an apocalyptic number.

28704106 is a deficient number, since it is larger than the sum of its proper divisors (14376698).

28704106 is a wasteful number, since it uses less digits than its factorization.

28704106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28704106 is about 5357.6213005400. The cubic root of 28704106 is about 306.1831887575.

Adding to 28704106 its reverse (60140782), we get a palindrome (88844888).

The spelling of 28704106 in words is "twenty-eight million, seven hundred four thousand, one hundred six".