28313103 has 32 divisors (see below), whose sum is σ = 47735296. Its totient is φ = 14525568.

The previous prime is 28313099. The next prime is 28313111. The reversal of 28313103 is 30131382.

It is a happy number.

It is not a de Polignac number, because 28313103 - 2² = 28313099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 28313103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28313203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8700 + ... + 11502.

It is an arithmetic number, because the mean of its divisors is an integer number (1491728).

Almost surely, 2^28313103 is an apocalyptic number.

28313103 is a deficient number, since it is larger than the sum of its proper divisors (19422193).

28313103 is a wasteful number, since it uses less digits than its factorization.

28313103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 28313103 is about 5321.0058259694. The cubic root of 28313103 is about 304.7865675117.

Adding to 28313103 its reverse (30131382), we get a palindrome (58444485).

The spelling of 28313103 in words is "twenty-eight million, three hundred thirteen thousand, one hundred three".