28564031 has 2 divisors, whose sum is σ = 28564032. Its totient is φ = 28564030.

The previous prime is 28564009. The next prime is 28564057. The reversal of 28564031 is 13046582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28564031 - 2²² = 24369727 is a prime.

It is a super-2 number, since 2×28564031² = 1631807733937922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28563985 and 28564003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28564001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14282015 + 14282016.

It is an arithmetic number, because the mean of its divisors is an integer number (14282016).

Almost surely, 2^28564031 is an apocalyptic number.

28564031 is a deficient number, since it is larger than the sum of its proper divisors (1).

28564031 is an equidigital number, since it uses as much as digits as its factorization.

28564031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28564031 is about 5344.5328140072. The cubic root of 28564031 is about 305.6843220927.

The spelling of 28564031 in words is "twenty-eight million, five hundred sixty-four thousand, thirty-one".