56857242 has 64 divisors (see below), whose sum is σ = 131072256. Its totient is φ = 16304640.

The previous prime is 56857217. The next prime is 56857261. The reversal of 56857242 is 24275865.

56857242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 56857242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73168 + ... + 73940.

It is an arithmetic number, because the mean of its divisors is an integer number (2048004).

Almost surely, 2^56857242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56857242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65536128).

56857242 is an abundant number, since it is smaller than the sum of its proper divisors (74215014).

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

56857242 is a wasteful number, since it uses less digits than its factorization.

56857242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855.

The product of its digits is 134400, while the sum is 39.

The square root of 56857242 is about 7540.3741286491. The cubic root of 56857242 is about 384.5285554495.

The spelling of 56857242 in words is "fifty-six million, eight hundred fifty-seven thousand, two hundred forty-two".