28202103 has 12 divisors (see below), whose sum is σ = 41837848. Its totient is φ = 18293040.

The previous prime is 28202101. The next prime is 28202107. The reversal of 28202103 is 30120282.

It is a happy number.

It is not a de Polignac number, because 28202103 - 2¹ = 28202101 is a prime.

It is a super-2 number, since 2×28202103² = 1590717227245218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28202101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42013 + ... + 42678.

Almost surely, 2^28202103 is an apocalyptic number.

28202103 is a deficient number, since it is larger than the sum of its proper divisors (13635745).

28202103 is a wasteful number, since it uses less digits than its factorization.

28202103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84734 (or 84731 counting only the distinct ones).

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

The square root of 28202103 is about 5310.5652241546. The cubic root of 28202103 is about 304.3877460801.

Adding to 28202103 its reverse (30120282), we get a palindrome (58322385).

The spelling of 28202103 in words is "twenty-eight million, two hundred two thousand, one hundred three".