28372739873 has 2 divisors, whose sum is σ = 28372739874. Its totient is φ = 28372739872.

The previous prime is 28372739869. The next prime is 28372739939. The reversal of 28372739873 is 37893727382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19781859904 + 8590879969 = 140648^2 + 92687^2 .

It is a cyclic number.

It is not a de Polignac number, because 28372739873 - 2² = 28372739869 is a prime.

It is a super-2 number, since 2×28372739873² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28372732873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14186369936 + 14186369937.

It is an arithmetic number, because the mean of its divisors is an integer number (14186369937).

Almost surely, 2^28372739873 is an apocalyptic number.

It is an amenable number.

28372739873 is a deficient number, since it is larger than the sum of its proper divisors (1).

28372739873 is an equidigital number, since it uses as much as digits as its factorization.

28372739873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21337344, while the sum is 59.

The spelling of 28372739873 in words is "twenty-eight billion, three hundred seventy-two million, seven hundred thirty-nine thousand, eight hundred seventy-three".