57730220 has 12 divisors (see below), whose sum is σ = 121233504. Its totient is φ = 23092080.

The previous prime is 57730219. The next prime is 57730247. The reversal of 57730220 is 2203775.

57730220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 57730220.

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 3 ways as a sum of consecutive naturals, for example, 1443236 + ... + 1443275.

It is an arithmetic number, because the mean of its divisors is an integer number (10102792).

Almost surely, 2^57730220 is an apocalyptic number.

It is an amenable number.

57730220 is an abundant number, since it is smaller than the sum of its proper divisors (63503284).

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

57730220 is a wasteful number, since it uses less digits than its factorization.

57730220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886520 (or 2886518 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 57730220 is about 7598.0405368753. The cubic root of 57730220 is about 386.4865672702.

Adding to 57730220 its reverse (2203775), we get a palindrome (59933995).

The spelling of 57730220 in words is "fifty-seven million, seven hundred thirty thousand, two hundred twenty".