649220000 has 240 divisors, whose sum is σ = 1884671712. Its totient is φ = 216960000.

The previous prime is 649219999. The next prime is 649220009. The reversal of 649220000 is 22946.

It is not an unprimeable number, because it can be changed into a prime (649220009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2859887 + ... + 2860113.

Almost surely, 2^649220000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (942335856).

649220000 is an abundant number, since it is smaller than the sum of its proper divisors (1235451712).

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

649220000 is a wasteful number, since it uses less digits than its factorization.

649220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 649220000 is about 25479.7959175500. The cubic root of 649220000 is about 865.8924710080.

Adding to 649220000 its reverse (22946), we get a palindrome (649242946).

The spelling of 649220000 in words is "six hundred forty-nine million, two hundred twenty thousand".