28151303 has 4 divisors (see below), whose sum is σ = 29807280. Its totient is φ = 26495328.

The previous prime is 28151281. The next prime is 28151311. The reversal of 28151303 is 30315182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28151303 - 2⁸ = 28151047 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 (28151363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827963 + ... + 827996.

It is an arithmetic number, because the mean of its divisors is an integer number (7451820).

Almost surely, 2^28151303 is an apocalyptic number.

28151303 is a deficient number, since it is larger than the sum of its proper divisors (1655977).

28151303 is a wasteful number, since it uses less digits than its factorization.

28151303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655976.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 28151303 is about 5305.7801499874. The cubic root of 28151303 is about 304.2048732974.

Adding to 28151303 its reverse (30315182), we get a palindrome (58466485).

The spelling of 28151303 in words is "twenty-eight million, one hundred fifty-one thousand, three hundred three".