28502313 has 16 divisors (see below), whose sum is σ = 45321216. Its totient is φ = 15578640.

The previous prime is 28502297. The next prime is 28502317. The reversal of 28502313 is 31320582.

It is not a de Polignac number, because 28502313 - 2⁴ = 28502297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28502317) 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 15 ways as a sum of consecutive naturals, for example, 29023 + ... + 29988.

It is an arithmetic number, because the mean of its divisors is an integer number (2832576).

Almost surely, 2^28502313 is an apocalyptic number.

28502313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28502313 is a deficient number, since it is larger than the sum of its proper divisors (16818903).

28502313 is a wasteful number, since it uses less digits than its factorization.

28502313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59044.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28502313 is about 5338.7557539187. The cubic root of 28502313 is about 305.4640003725.

Adding to 28502313 its reverse (31320582), we get a palindrome (59822895).

The spelling of 28502313 in words is "twenty-eight million, five hundred two thousand, three hundred thirteen".