57056340 has 144 divisors (see below), whose sum is σ = 182327040. Its totient is φ = 13305600.

The previous prime is 57056339. The next prime is 57056347. The reversal of 57056340 is 4365075.

57056340 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 (30).

It is a junction number, because it is equal to n+sod(n) for n = 57056298 and 57056307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57056347) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 210405 + ... + 210675.

It is an arithmetic number, because the mean of its divisors is an integer number (1266160).

Almost surely, 2^57056340 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 57056340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91163520).

57056340 is an abundant number, since it is smaller than the sum of its proper divisors (125270700).

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

57056340 is a wasteful number, since it uses less digits than its factorization.

57056340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 57056340 is about 7553.5647213749. The cubic root of 57056340 is about 384.9768693586.

The spelling of 57056340 in words is "fifty-seven million, fifty-six thousand, three hundred forty".