648281634 has 288 divisors, whose sum is σ = 1927701504. Its totient is φ = 140849280.

The previous prime is 648281629. The next prime is 648281639. The reversal of 648281634 is 436182846.

It is an interprime number because it is at equal distance from previous prime (648281629) and next prime (648281639).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648281639) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 28186147 + ... + 28186169.

It is an arithmetic number, because the mean of its divisors is an integer number (6693408).

Almost surely, 2^648281634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648281634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963850752).

648281634 is an abundant number, since it is smaller than the sum of its proper divisors (1279419870).

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

648281634 is a wasteful number, since it uses less digits than its factorization.

648281634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 78 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 648281634 is about 25461.3753359869. The cubic root of 648281634 is about 865.4750902351.

It can be divided in two parts, 648 and 281634, that added together give a palindrome (282282).

The spelling of 648281634 in words is "six hundred forty-eight million, two hundred eighty-one thousand, six hundred thirty-four".