649413220 has 12 divisors (see below), whose sum is σ = 1363767804. Its totient is φ = 259765280.

The previous prime is 649413161. The next prime is 649413221. The reversal of 649413220 is 22314946.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 501401664 + 148011556 = 22392^2 + 12166^2 .

It is not an unprimeable number, because it can be changed into a prime (649413221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16235311 + ... + 16235350.

It is an arithmetic number, because the mean of its divisors is an integer number (113647317).

Almost surely, 2^649413220 is an apocalyptic number.

It is an amenable number.

649413220 is an abundant number, since it is smaller than the sum of its proper divisors (714354584).

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

649413220 is a wasteful number, since it uses less digits than its factorization.

649413220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32470670 (or 32470668 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 649413220 is about 25483.5872671019. The cubic root of 649413220 is about 865.9783644124.

The spelling of 649413220 in words is "six hundred forty-nine million, four hundred thirteen thousand, two hundred twenty".