28307103 has 24 divisors (see below), whose sum is σ = 42932400. Its totient is φ = 16558080.

The previous prime is 28307101. The next prime is 28307107. The reversal of 28307103 is 30170382.

It is not a de Polignac number, because 28307103 - 2¹ = 28307101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28307101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9183 + ... + 11871.

It is an arithmetic number, because the mean of its divisors is an integer number (1788850).

Almost surely, 2^28307103 is an apocalyptic number.

28307103 is a deficient number, since it is larger than the sum of its proper divisors (14625297).

28307103 is a wasteful number, since it uses less digits than its factorization.

28307103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743 (or 2732 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 28307103 is about 5320.4419929175. The cubic root of 28307103 is about 304.7650362723.

Adding to 28307103 its reverse (30170382), we get a palindrome (58477485).

The spelling of 28307103 in words is "twenty-eight million, three hundred seven thousand, one hundred three".