28360831 has 2 divisors, whose sum is σ = 28360832. Its totient is φ = 28360830.

The previous prime is 28360793. The next prime is 28360841. The reversal of 28360831 is 13806382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28360831 - 2¹⁵ = 28328063 is a prime.

It is a super-2 number, since 2×28360831² = 1608673470021122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28360793 and 28360802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28360841) 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 as a sum of consecutive naturals, namely, 14180415 + 14180416.

It is an arithmetic number, because the mean of its divisors is an integer number (14180416).

Almost surely, 2^28360831 is an apocalyptic number.

28360831 is a deficient number, since it is larger than the sum of its proper divisors (1).

28360831 is an equidigital number, since it uses as much as digits as its factorization.

28360831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28360831 is about 5325.4888038564. The cubic root of 28360831 is about 304.9577331020.

The spelling of 28360831 in words is "twenty-eight million, three hundred sixty thousand, eight hundred thirty-one".