28585331 has 2 divisors, whose sum is σ = 28585332. Its totient is φ = 28585330.

The previous prime is 28585327. The next prime is 28585399. The reversal of 28585331 is 13358582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28585331 - 2² = 28585327 is a prime.

It is a super-2 number, since 2×28585331² = 1634242296759122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28585291 and 28585300.

It is not a weakly prime, because it can be changed into another prime (28585031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14292665 + 14292666.

It is an arithmetic number, because the mean of its divisors is an integer number (14292666).

Almost surely, 2^28585331 is an apocalyptic number.

28585331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28585331 is an equidigital number, since it uses as much as digits as its factorization.

28585331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 35.

The square root of 28585331 is about 5346.5251332057. The cubic root of 28585331 is about 305.7602854411.

The spelling of 28585331 in words is "twenty-eight million, five hundred eighty-five thousand, three hundred thirty-one".