56646 has 16 divisors (see below), whose sum is σ = 126000. Its totient is φ = 18864.
The previous prime is 56633. The next prime is 56659. The reversal of 56646 is 64665.
It is an interprime number because it is at equal distance from previous prime (56633) and next prime (56659).
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471 + ... + 578.
It is an arithmetic number, because the mean of its divisors is an integer number (7875).
256646 is an apocalyptic number.
56646 is an abundant number, since it is smaller than the sum of its proper divisors (69354).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63000).
56646 is a wasteful number, since it uses less digits than its factorization.
56646 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1060 (or 1054 counting only the distinct ones).
The product of its digits is 4320, while the sum is 27.
The square root of 56646 is about 238.0042016436. The cubic root of 56646 is about 38.4051750838.
Subtracting from 56646 its product of digits (4320), we obtain a triangular number (52326 = T323).
The spelling of 56646 in words is "fifty-six thousand, six hundred forty-six".
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