646072 has 32 divisors (see below), whose sum is σ = 1411200. Its totient is φ = 271584.

The previous prime is 646067. The next prime is 646073. The reversal of 646072 is 270646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646073) 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, 4579 + ... + 4717.

It is an arithmetic number, because the mean of its divisors is an integer number (44100).

2⁶⁴⁶⁰⁷² 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 646072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705600).

646072 is an abundant number, since it is smaller than the sum of its proper divisors (765128).

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

646072 is a wasteful number, since it uses less digits than its factorization.

646072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 646072 is about 803.7860411826. The cubic root of 646072 is about 86.4490662089.

The spelling of 646072 in words is "six hundred forty-six thousand, seventy-two".