857475944 has 64 divisors (see below), whose sum is σ = 1798146000. Its totient is φ = 380620800.

The previous prime is 857475919. The next prime is 857475991. The reversal of 857475944 is 449574758.

It can be written as a sum of positive squares in 8 ways, for example, as 389272900 + 468203044 = 19730^2 + 21638^2 .

It is a super-2 number, since 2×857475944² = 1470529989077382272, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1209062 + ... + 1209770.

Almost surely, 2^857475944 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 857475944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (899073000).

857475944 is an abundant number, since it is smaller than the sum of its proper divisors (940670056).

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

857475944 is a wasteful number, since it uses less digits than its factorization.

857475944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1154 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 53.

The square root of 857475944 is about 29282.6901769629. The cubic root of 857475944 is about 950.0372816394.

The spelling of 857475944 in words is "eight hundred fifty-seven million, four hundred seventy-five thousand, nine hundred forty-four".