656238 has 32 divisors (see below), whose sum is σ = 1464192. Its totient is φ = 194400.

The previous prime is 656237. The next prime is 656263. The reversal of 656238 is 832656.

It is a d-powerful number, because it can be written as 6 + 5⁷ + 2 + 6⁶ + 3¹² + 8 .

Its product of digits (8640) is a multiple of the sum of its prime divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3945 + ... + 4107.

It is an arithmetic number, because the mean of its divisors is an integer number (45756).

2⁶⁵⁶²³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (732096).

656238 is an abundant number, since it is smaller than the sum of its proper divisors (807954).

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

656238 is a wasteful number, since it uses less digits than its factorization.

656238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240.

The product of its digits is 8640, while the sum is 30.

The square root of 656238 is about 810.0851807063. The cubic root of 656238 is about 86.9001364387.

The spelling of 656238 in words is "six hundred fifty-six thousand, two hundred thirty-eight".