648736 has 48 divisors (see below), whose sum is σ = 1481760. Its totient is φ = 276480.

The previous prime is 648731. The next prime is 648763. The reversal of 648736 is 637846.

It is not an unprimeable number, because it can be changed into a prime (648731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6640 + ... + 6736.

It is an arithmetic number, because the mean of its divisors is an integer number (30870).

2⁶⁴⁸⁷³⁶ 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 648736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740880).

648736 is an abundant number, since it is smaller than the sum of its proper divisors (833024).

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

648736 is a wasteful number, since it uses less digits than its factorization.

648736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 129 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 648736 is about 805.4414938405. The cubic root of 648736 is about 86.5677240349.

The spelling of 648736 in words is "six hundred forty-eight thousand, seven hundred thirty-six".