857728363 has 2 divisors, whose sum is σ = 857728364. Its totient is φ = 857728362.

The previous prime is 857728357. The next prime is 857728379. The reversal of 857728363 is 363827758.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857728363 is a prime.

It is not a weakly prime, because it can be changed into another prime (857728393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428864181 + 428864182.

It is an arithmetic number, because the mean of its divisors is an integer number (428864182).

Almost surely, 2^857728363 is an apocalyptic number.

857728363 is a deficient number, since it is larger than the sum of its proper divisors (1).

857728363 is an equidigital number, since it uses as much as digits as its factorization.

857728363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 49.

The square root of 857728363 is about 29286.9998975655. Note that the first 3 decimals coincide. The cubic root of 857728363 is about 950.1304947241.

The spelling of 857728363 in words is "eight hundred fifty-seven million, seven hundred twenty-eight thousand, three hundred sixty-three".