853173720 has 384 divisors, whose sum is σ = 3387571200. Its totient is φ = 181896192.

The previous prime is 853173709. The next prime is 853173721. The reversal of 853173720 is 27371358.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853173721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4931554 + ... + 4931726.

It is an arithmetic number, because the mean of its divisors is an integer number (8821800).

Almost surely, 2^853173720 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 853173720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693785600).

853173720 is an abundant number, since it is smaller than the sum of its proper divisors (2534397480).

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

853173720 is a wasteful number, since it uses less digits than its factorization.

853173720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 853173720 is about 29209.1376113709. The cubic root of 853173720 is about 948.4457392184.

The spelling of 853173720 in words is "eight hundred fifty-three million, one hundred seventy-three thousand, seven hundred twenty".