857249512 has 96 divisors (see below), whose sum is σ = 1962635400. Its totient is φ = 349526016.

The previous prime is 857249509. The next prime is 857249521. The reversal of 857249512 is 215942758.

It can be written as a sum of positive squares in 4 ways, for example, as 855328516 + 1920996 = 29246^2 + 1386^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 829348 + ... + 830380.

Almost surely, 2^857249512 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 857249512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981317700).

857249512 is an abundant number, since it is smaller than the sum of its proper divisors (1105385888).

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

857249512 is a wasteful number, since it uses less digits than its factorization.

857249512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1144 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 857249512 is about 29278.8236102477. The cubic root of 857249512 is about 949.9536494468.

The spelling of 857249512 in words is "eight hundred fifty-seven million, two hundred forty-nine thousand, five hundred twelve".