647064 has 96 divisors (see below), whose sum is σ = 2059200. Its totient is φ = 181440.

The previous prime is 647057. The next prime is 647069. The reversal of 647064 is 460746.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647064.

It is not an unprimeable number, because it can be changed into a prime (647069) by changing a digit.

647064 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 23 ways as a sum of consecutive naturals, for example, 15027 + ... + 15069.

It is an arithmetic number, because the mean of its divisors is an integer number (21450).

2⁶⁴⁷⁰⁶⁴ 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 647064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029600).

647064 is an abundant number, since it is smaller than the sum of its proper divisors (1412136).

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

647064 is a wasteful number, since it uses less digits than its factorization.

647064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 647064 is about 804.4028841321. The cubic root of 647064 is about 86.4932891538.

The spelling of 647064 in words is "six hundred forty-seven thousand, sixty-four".