853520 has 40 divisors (see below), whose sum is σ = 2035584. Its totient is φ = 332672.

The previous prime is 853493. The next prime is 853529. The reversal of 853520 is 25358.

853520 = T₈₅ + T₈₆ + ... + T₁₇₈.

It is a tau number, because it is divible by the number of its divisors (40).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 853520.

It is not an unprimeable number, because it can be changed into a prime (853529) by changing a digit.

853520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3647 + ... + 3873.

2⁸⁵³⁵²⁰ is an apocalyptic number.

853520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 853520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1017792).

853520 is an abundant number, since it is smaller than the sum of its proper divisors (1182064).

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

853520 is a wasteful number, since it uses less digits than its factorization.

853520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 853520 is about 923.8614614757. The cubic root of 853520 is about 94.8574037969.

Adding to 853520 its reverse (25358), we get a palindrome (878878).

The spelling of 853520 in words is "eight hundred fifty-three thousand, five hundred twenty".