28455839 has 2 divisors, whose sum is σ = 28455840. Its totient is φ = 28455838.

The previous prime is 28455743. The next prime is 28455851. The reversal of 28455839 is 93855482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28455839 - 2¹² = 28451743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28455839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28452839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14227919 + 14227920.

It is an arithmetic number, because the mean of its divisors is an integer number (14227920).

Almost surely, 2^28455839 is an apocalyptic number.

28455839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28455839 is an equidigital number, since it uses as much as digits as its factorization.

28455839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 44.

The square root of 28455839 is about 5334.4014659566. The cubic root of 28455839 is about 305.2978868748.

The spelling of 28455839 in words is "twenty-eight million, four hundred fifty-five thousand, eight hundred thirty-nine".