857429287438 has 8 divisors (see below), whose sum is σ = 1291268011320. Its totient is φ = 427006617000.

The previous prime is 857429287411. The next prime is 857429287439. The reversal of 857429287438 is 834782924758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857429287439) 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 in 3 ways as a sum of consecutive naturals, for example, 854012733 + ... + 854013736.

It is an arithmetic number, because the mean of its divisors is an integer number (161408501415).

Almost surely, 2^857429287438 is an apocalyptic number.

857429287438 is a deficient number, since it is larger than the sum of its proper divisors (433838723882).

857429287438 is a wasteful number, since it uses less digits than its factorization.

857429287438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708026722.

The product of its digits is 216760320, while the sum is 67.

The spelling of 857429287438 in words is "eight hundred fifty-seven billion, four hundred twenty-nine million, two hundred eighty-seven thousand, four hundred thirty-eight".