57723220 has 12 divisors (see below), whose sum is σ = 121218804. Its totient is φ = 23089280.

The previous prime is 57723163. The next prime is 57723229. The reversal of 57723220 is 2232775.

It can be written as a sum of positive squares in 2 ways, for example, as 15888196 + 41835024 = 3986^2 + 6468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57723229) 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, 1443061 + ... + 1443100.

It is an arithmetic number, because the mean of its divisors is an integer number (10101567).

Almost surely, 2^57723220 is an apocalyptic number.

It is an amenable number.

57723220 is an abundant number, since it is smaller than the sum of its proper divisors (63495584).

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

57723220 is a wasteful number, since it uses less digits than its factorization.

57723220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886170 (or 2886168 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 57723220 is about 7597.5798778295. The cubic root of 57723220 is about 386.4709456695.

Adding to 57723220 its reverse (2232775), we get a palindrome (59955995).

The spelling of 57723220 in words is "fifty-seven million, seven hundred twenty-three thousand, two hundred twenty".