28622831 has 2 divisors, whose sum is σ = 28622832. Its totient is φ = 28622830.

The previous prime is 28622819. The next prime is 28622837. The reversal of 28622831 is 13822682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28622831 - 2¹⁰ = 28621807 is a prime.

It is a super-2 number, since 2×28622831² = 1638532908909122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28622837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14311415 + 14311416.

It is an arithmetic number, because the mean of its divisors is an integer number (14311416).

Almost surely, 2^28622831 is an apocalyptic number.

28622831 is a deficient number, since it is larger than the sum of its proper divisors (1).

28622831 is an equidigital number, since it uses as much as digits as its factorization.

28622831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 28622831 is about 5350.0309344900. The cubic root of 28622831 is about 305.8939320821.

The spelling of 28622831 in words is "twenty-eight million, six hundred twenty-two thousand, eight hundred thirty-one".