648611140 has 48 divisors (see below), whose sum is σ = 1438778880. Its totient is φ = 245226240.

The previous prime is 648611137. The next prime is 648611141. The reversal of 648611140 is 41116846.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (648611141) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14496 + ... + 38824.

It is an arithmetic number, because the mean of its divisors is an integer number (29974560).

Almost surely, 2^648611140 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 648611140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719389440).

648611140 is an abundant number, since it is smaller than the sum of its proper divisors (790167740).

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

648611140 is a wasteful number, since it uses less digits than its factorization.

648611140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24412 (or 24410 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 648611140 is about 25467.8452170575. The cubic root of 648611140 is about 865.6216988062.

Adding to 648611140 its reverse (41116846), we get a palindrome (689727986).

The spelling of 648611140 in words is "six hundred forty-eight million, six hundred eleven thousand, one hundred forty".