28252106 has 4 divisors (see below), whose sum is σ = 42378162. Its totient is φ = 14126052.

The previous prime is 28252057. The next prime is 28252117. The reversal of 28252106 is 60125282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23668225 + 4583881 = 4865^2 + 2141^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7063025 + ... + 7063028.

Almost surely, 2^28252106 is an apocalyptic number.

28252106 is a deficient number, since it is larger than the sum of its proper divisors (14126056).

28252106 is a wasteful number, since it uses less digits than its factorization.

28252106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14126055.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 28252106 is about 5315.2710184900. The cubic root of 28252106 is about 304.5675354384.

Adding to 28252106 its reverse (60125282), we get a palindrome (88377388).

The spelling of 28252106 in words is "twenty-eight million, two hundred fifty-two thousand, one hundred six".