57206656 has 64 divisors (see below), whose sum is σ = 126806400. Its totient is φ = 25528320.

The previous prime is 57206651. The next prime is 57206657. The reversal of 57206656 is 65660275.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57206651) 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, 51030 + ... + 52138.

It is an arithmetic number, because the mean of its divisors is an integer number (1981350).

Almost surely, 2^57206656 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 57206656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63403200).

57206656 is an abundant number, since it is smaller than the sum of its proper divisors (69599744).

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

57206656 is a wasteful number, since it uses less digits than its factorization.

57206656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 57206656 is about 7563.5081807320. The cubic root of 57206656 is about 385.3146491687.

The spelling of 57206656 in words is "fifty-seven million, two hundred six thousand, six hundred fifty-six".