650643000 has 128 divisors (see below), whose sum is σ = 2320081920. Its totient is φ = 148713600.

The previous prime is 650642969. The next prime is 650643013. The reversal of 650643000 is 346056.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5509 + ... + 36491.

It is an arithmetic number, because the mean of its divisors is an integer number (18125640).

Almost surely, 2^650643000 is an apocalyptic number.

650643000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 650643000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1160040960).

650643000 is an abundant number, since it is smaller than the sum of its proper divisors (1669438920).

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

650643000 is a wasteful number, since it uses less digits than its factorization.

650643000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31014 (or 31000 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 650643000 is about 25507.7047183787. The cubic root of 650643000 is about 866.5246479979.

Adding to 650643000 its reverse (346056), we get a palindrome (650989056).

The spelling of 650643000 in words is "six hundred fifty million, six hundred forty-three thousand".