857914512 has 160 divisors (see below), whose sum is σ = 2744324352. Its totient is φ = 224888832.

The previous prime is 857914489. The next prime is 857914517. The reversal of 857914512 is 215419758.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (857914517) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 859998 + ... + 860994.

Almost surely, 2^857914512 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 857914512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372162176).

857914512 is an abundant number, since it is smaller than the sum of its proper divisors (1886409840).

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

857914512 is a wasteful number, since it uses less digits than its factorization.

857914512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1219 counting only the distinct ones).

The product of its digits is 100800, while the sum is 42.

The square root of 857914512 is about 29290.1777393037. The cubic root of 857914512 is about 950.1992239612.

The spelling of 857914512 in words is "eight hundred fifty-seven million, nine hundred fourteen thousand, five hundred twelve".