649983285 has 80 divisors (see below), whose sum is σ = 1359072000. Its totient is φ = 297071712.

The previous prime is 649983283. The next prime is 649983307. The reversal of 649983285 is 582389946.

It is not a de Polignac number, because 649983285 - 2¹ = 649983283 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649983283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 136576 + ... + 141254.

It is an arithmetic number, because the mean of its divisors is an integer number (16988400).

Almost surely, 2^649983285 is an apocalyptic number.

It is an amenable number.

649983285 is an abundant number, since it is smaller than the sum of its proper divisors (709088715).

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

649983285 is an equidigital number, since it uses as much as digits as its factorization.

649983285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4717 (or 4694 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 649983285 is about 25494.7697577366. The cubic root of 649983285 is about 866.2316800533.

The spelling of 649983285 in words is "six hundred forty-nine million, nine hundred eighty-three thousand, two hundred eighty-five".