28505102 has 8 divisors (see below), whose sum is σ = 42780312. Its totient is φ = 14245000.

The previous prime is 28505093. The next prime is 28505153. The reversal of 28505102 is 20150582.

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

It is a congruent number.

It is an unprimeable number.

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, 5477 + ... + 9327.

It is an arithmetic number, because the mean of its divisors is an integer number (5347539).

Almost surely, 2^28505102 is an apocalyptic number.

28505102 is a deficient number, since it is larger than the sum of its proper divisors (14275210).

28505102 is a wasteful number, since it uses less digits than its factorization.

28505102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7554.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 28505102 is about 5339.0169507129. The cubic root of 28505102 is about 305.4739634389.

Adding to 28505102 its reverse (20150582), we get a palindrome (48655684).

The spelling of 28505102 in words is "twenty-eight million, five hundred five thousand, one hundred two".