28738472393 has 2 divisors, whose sum is σ = 28738472394. Its totient is φ = 28738472392.

The previous prime is 28738472383. The next prime is 28738472417. The reversal of 28738472393 is 39327483782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21323884729 + 7414587664 = 146027^2 + 86108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28738472393 is a prime.

It is not a weakly prime, because it can be changed into another prime (28738472383) 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, 14369236196 + 14369236197.

It is an arithmetic number, because the mean of its divisors is an integer number (14369236197).

Almost surely, 2^28738472393 is an apocalyptic number.

It is an amenable number.

28738472393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28738472393 is an equidigital number, since it uses as much as digits as its factorization.

28738472393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 56.

The spelling of 28738472393 in words is "twenty-eight billion, seven hundred thirty-eight million, four hundred seventy-two thousand, three hundred ninety-three".