28231803 has 6 divisors (see below), whose sum is σ = 40779284. Its totient is φ = 18821196.

The previous prime is 28231769. The next prime is 28231817. The reversal of 28231803 is 30813282.

It is not a de Polignac number, because 28231803 - 2⁸ = 28231547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28231103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1568425 + ... + 1568442.

Almost surely, 2^28231803 is an apocalyptic number.

28231803 is a deficient number, since it is larger than the sum of its proper divisors (12547481).

28231803 is a wasteful number, since it uses less digits than its factorization.

28231803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136873 (or 3136870 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28231803 is about 5313.3608008491. The cubic root of 28231803 is about 304.4945601526.

The spelling of 28231803 in words is "twenty-eight million, two hundred thirty-one thousand, eight hundred three".