28432559 has 2 divisors, whose sum is σ = 28432560. Its totient is φ = 28432558.

The previous prime is 28432529. The next prime is 28432561. The reversal of 28432559 is 95523482.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28432559 is a prime.

It is a super-2 number, since 2×28432559² = 1616820822576962, which contains 22 as substring.

Together with 28432561, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28432529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14216279 + 14216280.

It is an arithmetic number, because the mean of its divisors is an integer number (14216280).

Almost surely, 2^28432559 is an apocalyptic number.

28432559 is a deficient number, since it is larger than the sum of its proper divisors (1).

28432559 is an equidigital number, since it uses as much as digits as its factorization.

28432559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 28432559 is about 5332.2189564946. The cubic root of 28432559 is about 305.2146084320.

The spelling of 28432559 in words is "twenty-eight million, four hundred thirty-two thousand, five hundred fifty-nine".