28682431 has 2 divisors, whose sum is σ = 28682432. Its totient is φ = 28682430.

The previous prime is 28682413. The next prime is 28682443. The reversal of 28682431 is 13428682.

Together with previous prime (28682413) 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 not a de Polignac number, because 28682431 - 2⁵ = 28682399 is a prime.

It is a super-2 number, since 2×28682431² = 1645363696139522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28682461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14341215 + 14341216.

It is an arithmetic number, because the mean of its divisors is an integer number (14341216).

Almost surely, 2^28682431 is an apocalyptic number.

28682431 is a deficient number, since it is larger than the sum of its proper divisors (1).

28682431 is an equidigital number, since it uses as much as digits as its factorization.

28682431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 34.

The square root of 28682431 is about 5355.5980991856. The cubic root of 28682431 is about 306.1061011593.

The spelling of 28682431 in words is "twenty-eight million, six hundred eighty-two thousand, four hundred thirty-one".