28470229393 has 2 divisors, whose sum is σ = 28470229394. Its totient is φ = 28470229392.

The previous prime is 28470229369. The next prime is 28470229397. The reversal of 28470229393 is 39392207482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25010789904 + 3459439489 = 158148^2 + 58817^2 .

It is a cyclic number.

It is not a de Polignac number, because 28470229393 - 2³³ = 19880294801 is a prime.

It is a super-2 number, since 2×28470229393² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28470229397) 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, 14235114696 + 14235114697.

It is an arithmetic number, because the mean of its divisors is an integer number (14235114697).

Almost surely, 2^28470229393 is an apocalyptic number.

It is an amenable number.

28470229393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28470229393 is an equidigital number, since it uses as much as digits as its factorization.

28470229393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 28470229393 in words is "twenty-eight billion, four hundred seventy million, two hundred twenty-nine thousand, three hundred ninety-three".