57728223 has 36 divisors (see below), whose sum is σ = 98286240. Its totient is φ = 32550336.

The previous prime is 57728221. The next prime is 57728227. The reversal of 57728223 is 32282775.

It is a happy number.

57728223 is a `hidden beast` number, since 577 + 2 + 82 + 2 + 3 = 666.

It is not a de Polignac number, because 57728223 - 2¹ = 57728221 is a prime.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 34011 + ... + 35667.

Almost surely, 2^57728223 is an apocalyptic number.

57728223 is a deficient number, since it is larger than the sum of its proper divisors (40558017).

57728223 is a wasteful number, since it uses less digits than its factorization.

57728223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756 (or 1746 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 57728223 is about 7597.9091202778. The cubic root of 57728223 is about 386.4821107794.

The spelling of 57728223 in words is "fifty-seven million, seven hundred twenty-eight thousand, two hundred twenty-three".