656380 has 24 divisors (see below), whose sum is σ = 1417248. Its totient is φ = 255168.

The previous prime is 656377. The next prime is 656389. The reversal of 656380 is 83656.

656380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656389) 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, 297 + ... + 1183.

It is an arithmetic number, because the mean of its divisors is an integer number (59052).

2⁶⁵⁶³⁸⁰ 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 656380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708624).

656380 is an abundant number, since it is smaller than the sum of its proper divisors (760868).

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

656380 is a wasteful number, since it uses less digits than its factorization.

656380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 656380 is about 810.1728210697. The cubic root of 656380 is about 86.9064039460.

The spelling of 656380 in words is "six hundred fifty-six thousand, three hundred eighty".