28551103 has 16 divisors (see below), whose sum is σ = 33672960. Its totient is φ = 23702976.

The previous prime is 28551101. The next prime is 28551139. The reversal of 28551103 is 30115582.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28551103 - 2¹ = 28551101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29676 + ... + 30622.

It is an arithmetic number, because the mean of its divisors is an integer number (2104560).

Almost surely, 2^28551103 is an apocalyptic number.

28551103 is a deficient number, since it is larger than the sum of its proper divisors (5121857).

28551103 is an equidigital number, since it uses as much as digits as its factorization.

28551103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 28551103 is about 5343.3232168754. The cubic root of 28551103 is about 305.6381978457.

Adding to 28551103 its reverse (30115582), we get a palindrome (58666685).

The spelling of 28551103 in words is "twenty-eight million, five hundred fifty-one thousand, one hundred three".