649883090 has 8 divisors (see below), whose sum is σ = 1169789580. Its totient is φ = 259953232.

The previous prime is 649883077. The next prime is 649883099. The reversal of 649883090 is 90388946.

It can be written as a sum of positive squares in 2 ways, for example, as 630160609 + 19722481 = 25103^2 + 4441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (649883099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32494145 + ... + 32494164.

Almost surely, 2^649883090 is an apocalyptic number.

649883090 is a deficient number, since it is larger than the sum of its proper divisors (519906490).

649883090 is a wasteful number, since it uses less digits than its factorization.

649883090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64988316.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 649883090 is about 25492.8046711224. The cubic root of 649883090 is about 866.1871678609.

The spelling of 649883090 in words is "six hundred forty-nine million, eight hundred eighty-three thousand, ninety".