56240 has 40 divisors (see below), whose sum is σ = 141360. Its totient is φ = 20736.

The previous prime is 56239. The next prime is 56249. The reversal of 56240 is 4265.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (56249) 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, 1502 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (3534).

2⁵⁶²⁴⁰ 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 56240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70680).

56240 is an abundant number, since it is smaller than the sum of its proper divisors (85120).

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

56240 is a wasteful number, since it uses less digits than its factorization.

56240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 56240 is about 237.1497417245. The cubic root of 56240 is about 38.3132009386.

The spelling of 56240 in words is "fifty-six thousand, two hundred forty".