857080442 has 8 divisors (see below), whose sum is σ = 1329952500. Its totient is φ = 413762944.

The previous prime is 857080417. The next prime is 857080447. The reversal of 857080442 is 244080758.

It can be written as a sum of positive squares in 2 ways, for example, as 769452121 + 87628321 = 27739^2 + 9361^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 857080396 and 857080405.

It is not an unprimeable number, because it can be changed into a prime (857080447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7388567 + ... + 7388682.

Almost surely, 2^857080442 is an apocalyptic number.

857080442 is a deficient number, since it is larger than the sum of its proper divisors (472872058).

857080442 is a wasteful number, since it uses less digits than its factorization.

857080442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14777280.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 857080442 is about 29275.9362275573. The cubic root of 857080442 is about 949.8911941869.

The spelling of 857080442 in words is "eight hundred fifty-seven million, eighty thousand, four hundred forty-two".