28432378747 has 2 divisors, whose sum is σ = 28432378748. Its totient is φ = 28432378746.

The previous prime is 28432378727. The next prime is 28432378861. The reversal of 28432378747 is 74787323482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28432378747 - 2³¹ = 26284895099 is a prime.

It is a super-2 number, since 2×28432378747² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28432378727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14216189373 + 14216189374.

It is an arithmetic number, because the mean of its divisors is an integer number (14216189374).

Almost surely, 2^28432378747 is an apocalyptic number.

28432378747 is a deficient number, since it is larger than the sum of its proper divisors (1).

28432378747 is an equidigital number, since it uses as much as digits as its factorization.

28432378747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12644352, while the sum is 55.

The spelling of 28432378747 in words is "twenty-eight billion, four hundred thirty-two million, three hundred seventy-eight thousand, seven hundred forty-seven".