57772220 has 96 divisors (see below), whose sum is σ = 140507136. Its totient is φ = 19756800.

The previous prime is 57772219. The next prime is 57772223. The reversal of 57772220 is 2227775.

57772220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57772223) 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 31 ways as a sum of consecutive naturals, for example, 293162 + ... + 293358.

It is an arithmetic number, because the mean of its divisors is an integer number (1463616).

Almost surely, 2^57772220 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 57772220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70253568).

57772220 is an abundant number, since it is smaller than the sum of its proper divisors (82734916).

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

57772220 is a wasteful number, since it uses less digits than its factorization.

57772220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 57772220 is about 7600.8039048511. The cubic root of 57772220 is about 386.5802703655.

Adding to 57772220 its reverse (2227775), we get a palindrome (59999995).

It can be divided in two parts, 5777 and 2220, that added together give a palindrome (7997).

The spelling of 57772220 in words is "fifty-seven million, seven hundred seventy-two thousand, two hundred twenty".