57728201 has 4 divisors (see below), whose sum is σ = 57752004. Its totient is φ = 57704400.

The previous prime is 57728179. The next prime is 57728219. The reversal of 57728201 is 10282775.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42510400 + 15217801 = 6520^2 + 3901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57728201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57728221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7790 + ... + 13271.

It is an arithmetic number, because the mean of its divisors is an integer number (14438001).

Almost surely, 2^57728201 is an apocalyptic number.

It is an amenable number.

57728201 is a deficient number, since it is larger than the sum of its proper divisors (23803).

57728201 is a wasteful number, since it uses less digits than its factorization.

57728201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23802.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 57728201 is about 7597.9076725109. The cubic root of 57728201 is about 386.4820616838.

The spelling of 57728201 in words is "fifty-seven million, seven hundred twenty-eight thousand, two hundred one".