28122003 has 24 divisors (see below), whose sum is σ = 49996128. Its totient is φ = 14833152.

The previous prime is 28122001. The next prime is 28122007. The reversal of 28122003 is 30022182.

It is a happy number.

It is not a de Polignac number, because 28122003 - 2¹ = 28122001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28122001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16350 + ... + 17987.

It is an arithmetic number, because the mean of its divisors is an integer number (2083172).

Almost surely, 2^28122003 is an apocalyptic number.

28122003 is a deficient number, since it is larger than the sum of its proper divisors (21874125).

28122003 is a wasteful number, since it uses less digits than its factorization.

28122003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34363 (or 34360 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 28122003 is about 5303.0182915015. The cubic root of 28122003 is about 304.0992974042.

Adding to 28122003 its reverse (30022182), we get a palindrome (58144185).

The spelling of 28122003 in words is "twenty-eight million, one hundred twenty-two thousand, three".