28293933649 has 2 divisors, whose sum is σ = 28293933650. Its totient is φ = 28293933648.

The previous prime is 28293933643. The next prime is 28293933653. The reversal of 28293933649 is 94633939282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27401836225 + 892097424 = 165535^2 + 29868^2 .

It is a cyclic number.

It is not a de Polignac number, because 28293933649 - 2¹⁷ = 28293802577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28293933593 and 28293933602.

It is not a weakly prime, because it can be changed into another prime (28293933643) 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, 14146966824 + 14146966825.

It is an arithmetic number, because the mean of its divisors is an integer number (14146966825).

Almost surely, 2^28293933649 is an apocalyptic number.

It is an amenable number.

28293933649 is a deficient number, since it is larger than the sum of its proper divisors (1).

28293933649 is an equidigital number, since it uses as much as digits as its factorization.

28293933649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15116544, while the sum is 58.

The spelling of 28293933649 in words is "twenty-eight billion, two hundred ninety-three million, nine hundred thirty-three thousand, six hundred forty-nine".