857422552 has 64 divisors (see below), whose sum is σ = 1932595200. Its totient is φ = 348865920.

The previous prime is 857422549. The next prime is 857422561. The reversal of 857422552 is 255224758.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87349 + ... + 96667.

It is an arithmetic number, because the mean of its divisors is an integer number (30196800).

Almost surely, 2^857422552 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 857422552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (966297600).

857422552 is an abundant number, since it is smaller than the sum of its proper divisors (1075172648).

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

857422552 is a wasteful number, since it uses less digits than its factorization.

857422552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9416 (or 9412 counting only the distinct ones).

The product of its digits is 224000, while the sum is 40.

The square root of 857422552 is about 29281.7784978987. The cubic root of 857422552 is about 950.0175627409.

The spelling of 857422552 in words is "eight hundred fifty-seven million, four hundred twenty-two thousand, five hundred fifty-two".