857244 has 12 divisors (see below), whose sum is σ = 2000264. Its totient is φ = 285744.

The previous prime is 857221. The next prime is 857249. The reversal of 857244 is 442758.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35707 + ... + 35730.

2⁸⁵⁷²⁴⁴ is an apocalyptic number.

It is an amenable number.

857244 is an abundant number, since it is smaller than the sum of its proper divisors (1143020).

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

857244 is a wasteful number, since it uses less digits than its factorization.

857244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71444 (or 71442 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 857244 is about 925.8747215471. The cubic root of 857244 is about 94.9951613417.

The spelling of 857244 in words is "eight hundred fifty-seven thousand, two hundred forty-four".