57030220 has 48 divisors (see below), whose sum is σ = 129534048. Its totient is φ = 20966400.

The previous prime is 57030187. The next prime is 57030227. The reversal of 57030220 is 2203075.

It is a happy number.

57030220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (57030227) 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 15 ways as a sum of consecutive naturals, for example, 103987 + ... + 104533.

It is an arithmetic number, because the mean of its divisors is an integer number (2698626).

Almost surely, 2^57030220 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 57030220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64767024).

57030220 is an abundant number, since it is smaller than the sum of its proper divisors (72503828).

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

57030220 is a wasteful number, since it uses less digits than its factorization.

57030220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 57030220 is about 7551.8355384635. The cubic root of 57030220 is about 384.9181138042.

Adding to 57030220 its reverse (2203075), we get a palindrome (59233295).

The spelling of 57030220 in words is "fifty-seven million, thirty thousand, two hundred twenty".