28738472417 has 2 divisors, whose sum is σ = 28738472418. Its totient is φ = 28738472416.

The previous prime is 28738472393. The next prime is 28738472447. The reversal of 28738472417 is 71427483782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16119095521 + 12619376896 = 126961^2 + 112336^2 .

It is a cyclic number.

It is not a de Polignac number, because 28738472417 - 2²⁴ = 28721695201 is a prime.

It is not a weakly prime, because it can be changed into another prime (28738472447) 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, 14369236208 + 14369236209.

It is an arithmetic number, because the mean of its divisors is an integer number (14369236209).

Almost surely, 2^28738472417 is an apocalyptic number.

It is an amenable number.

28738472417 is a deficient number, since it is larger than the sum of its proper divisors (1).

28738472417 is an equidigital number, since it uses as much as digits as its factorization.

28738472417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4214784, while the sum is 53.

The spelling of 28738472417 in words is "twenty-eight billion, seven hundred thirty-eight million, four hundred seventy-two thousand, four hundred seventeen".