853784140 has 48 divisors (see below), whose sum is σ = 1997581824. Its totient is φ = 303857600.

The previous prime is 853784117. The next prime is 853784147. The reversal of 853784140 is 41487358.

It is a junction number, because it is equal to n+sod(n) for n = 853784093 and 853784102.

It is not an unprimeable number, because it can be changed into a prime (853784147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30946 + ... + 51625.

It is an arithmetic number, because the mean of its divisors is an integer number (41616288).

Almost surely, 2^853784140 is an apocalyptic number.

It is an amenable number.

853784140 is an abundant number, since it is smaller than the sum of its proper divisors (1143797684).

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

853784140 is a wasteful number, since it uses less digits than its factorization.

853784140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82638 (or 82636 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 853784140 is about 29219.5848704255. The cubic root of 853784140 is about 948.6718800444.

The spelling of 853784140 in words is "eight hundred fifty-three million, seven hundred eighty-four thousand, one hundred forty".