857238 has 8 divisors (see below), whose sum is σ = 1714488. Its totient is φ = 285744.

The previous prime is 857221. The next prime is 857249. The reversal of 857238 is 832758.

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

857238 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 857199 and 857208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71431 + ... + 71442.

It is an arithmetic number, because the mean of its divisors is an integer number (214311).

2⁸⁵⁷²³⁸ is an apocalyptic number.

857238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857238 is a wasteful number, since it uses less digits than its factorization.

857238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142878.

The product of its digits is 13440, while the sum is 33.

The square root of 857238 is about 925.8714813623. The cubic root of 857238 is about 94.9949397120.

The spelling of 857238 in words is "eight hundred fifty-seven thousand, two hundred thirty-eight".