57997220 has 12 divisors (see below), whose sum is σ = 121794204. Its totient is φ = 23198880.

The previous prime is 57997189. The next prime is 57997223. The reversal of 57997220 is 2279975.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9193024 + 48804196 = 3032^2 + 6986^2 .

It is not an unprimeable number, because it can be changed into a prime (57997223) 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, 1449911 + ... + 1449950.

It is an arithmetic number, because the mean of its divisors is an integer number (10149517).

Almost surely, 2^57997220 is an apocalyptic number.

It is an amenable number.

57997220 is an abundant number, since it is smaller than the sum of its proper divisors (63796984).

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

57997220 is a wasteful number, since it uses less digits than its factorization.

57997220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2899870 (or 2899868 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 57997220 is about 7615.5905877351. The cubic root of 57997220 is about 387.0814794599.

The spelling of 57997220 in words is "fifty-seven million, nine hundred ninety-seven thousand, two hundred twenty".