853263720 has 160 divisors (see below), whose sum is σ = 2879533800. Its totient is φ = 226616832.

The previous prime is 853263679. The next prime is 853263721. The reversal of 853263720 is 27362358.

It can be written as a sum of positive squares in 4 ways, for example, as 801682596 + 51581124 = 28314^2 + 7182^2 .

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

It is not an unprimeable number, because it can be changed into a prime (853263721) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1260022 + ... + 1260698.

Almost surely, 2^853263720 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 853263720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439766900).

853263720 is an abundant number, since it is smaller than the sum of its proper divisors (2026270080).

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

853263720 is a wasteful number, since it uses less digits than its factorization.

853263720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 853263720 is about 29210.6781845270. The cubic root of 853263720 is about 948.4790880794.

The spelling of 853263720 in words is "eight hundred fifty-three million, two hundred sixty-three thousand, seven hundred twenty".