28841531 has 2 divisors, whose sum is σ = 28841532. Its totient is φ = 28841530.

The previous prime is 28841513. The next prime is 28841539. The reversal of 28841531 is 13514882.

Together with previous prime (28841513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28841531 is a prime.

It is a super-2 number, since 2×28841531² = 1663667820847922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28841539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14420765 + 14420766.

It is an arithmetic number, because the mean of its divisors is an integer number (14420766).

Almost surely, 2^28841531 is an apocalyptic number.

28841531 is a deficient number, since it is larger than the sum of its proper divisors (1).

28841531 is an equidigital number, since it uses as much as digits as its factorization.

28841531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 32.

The square root of 28841531 is about 5370.4311744961. The cubic root of 28841531 is about 306.6710429170.

The spelling of 28841531 in words is "twenty-eight million, eight hundred forty-one thousand, five hundred thirty-one".