857082407 has 8 divisors (see below), whose sum is σ = 880438416. Its totient is φ = 833882112.

The previous prime is 857082341. The next prime is 857082427. The reversal of 857082407 is 704280758.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857082407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857082427) 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 7 ways as a sum of consecutive naturals, for example, 27728 + ... + 49829.

It is an arithmetic number, because the mean of its divisors is an integer number (110054802).

Almost surely, 2^857082407 is an apocalyptic number.

857082407 is a deficient number, since it is larger than the sum of its proper divisors (23356009).

857082407 is a wasteful number, since it uses less digits than its factorization.

857082407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77857.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 857082407 is about 29275.9697875237. The cubic root of 857082407 is about 949.8919201144.

The spelling of 857082407 in words is "eight hundred fifty-seven million, eighty-two thousand, four hundred seven".