857776344 has 64 divisors (see below), whose sum is σ = 2304547200. Its totient is φ = 265081344.

The previous prime is 857776343. The next prime is 857776349. The reversal of 857776344 is 443677758.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857776343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11647 + ... + 43025.

It is an arithmetic number, because the mean of its divisors is an integer number (36008550).

Almost surely, 2^857776344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857776344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152273600).

857776344 is an abundant number, since it is smaller than the sum of its proper divisors (1446770856).

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

857776344 is a wasteful number, since it uses less digits than its factorization.

857776344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31472 (or 31468 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 51.

The square root of 857776344 is about 29287.8190379550. The cubic root of 857776344 is about 950.1482110405.

The spelling of 857776344 in words is "eight hundred fifty-seven million, seven hundred seventy-six thousand, three hundred forty-four".