648536 has 32 divisors (see below), whose sum is σ = 1431840. Its totient is φ = 269568.

The previous prime is 648509. The next prime is 648563. The reversal of 648536 is 635846.

648536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (648509) and next prime (648563).

It is a congruent number.

It is an unprimeable number.

648536 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1916 + ... + 2228.

It is an arithmetic number, because the mean of its divisors is an integer number (44745).

2⁶⁴⁸⁵³⁶ 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 648536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715920).

648536 is an abundant number, since it is smaller than the sum of its proper divisors (783304).

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

648536 is a wasteful number, since it uses less digits than its factorization.

648536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 359 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 648536 is about 805.3173287593. The cubic root of 648536 is about 86.5588270803.

The spelling of 648536 in words is "six hundred forty-eight thousand, five hundred thirty-six".