653449986 has 96 divisors (see below), whose sum is σ = 1667952000. Its totient is φ = 184796640.

The previous prime is 653449921. The next prime is 653449997. The reversal of 653449986 is 689944356.

653449986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 672481 + ... + 673451.

It is an arithmetic number, because the mean of its divisors is an integer number (17374500).

Almost surely, 2^653449986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 653449986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (833976000).

653449986 is an abundant number, since it is smaller than the sum of its proper divisors (1014502014).

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

653449986 is a wasteful number, since it uses less digits than its factorization.

653449986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1092 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 653449986 is about 25562.6678185200. The cubic root of 653449986 is about 867.7689725074.

The spelling of 653449986 in words is "six hundred fifty-three million, four hundred forty-nine thousand, nine hundred eighty-six".