523656 has 48 divisors (see below), whose sum is σ = 1622400. Its totient is φ = 149472.

The previous prime is 523639. The next prime is 523657. The reversal of 523656 is 656325.

523656 is a `hidden beast` number, since 5 + 2 + 3 + 656 = 666.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (523657) by changing a digit.

523656 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 11 ways as a sum of consecutive naturals, for example, 16 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (33800).

2⁵²³⁶⁵⁶ is an apocalyptic number.

523656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811200).

523656 is an abundant number, since it is smaller than the sum of its proper divisors (1098744).

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

523656 is a wasteful number, since it uses less digits than its factorization.

523656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 1051 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 523656 is about 723.6407948699. The cubic root of 523656 is about 80.6025338522.

The spelling of 523656 in words is "five hundred twenty-three thousand, six hundred fifty-six".