857013984 has 72 divisors (see below), whose sum is σ = 2448056520. Its totient is φ = 284391168.

The previous prime is 857013977. The next prime is 857014001. The reversal of 857013984 is 489310758.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58822 + ... + 71930.

It is an arithmetic number, because the mean of its divisors is an integer number (34000785).

Almost surely, 2^857013984 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 857013984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224028260).

857013984 is an abundant number, since it is smaller than the sum of its proper divisors (1591042536).

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

857013984 is a wasteful number, since it uses less digits than its factorization.

857013984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13352 (or 13341 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 857013984 is about 29274.8011778048. The cubic root of 857013984 is about 949.8666420377.

The spelling of 857013984 in words is "eight hundred fifty-seven million, thirteen thousand, nine hundred eighty-four".