56730220 has 24 divisors (see below), whose sum is σ = 119355264. Its totient is φ = 22649856.

The previous prime is 56730203. The next prime is 56730221. The reversal of 56730220 is 2203765.

It is a super-2 number, since 2×56730220² = 6436635722496800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56730221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9804 + ... + 14476.

It is an arithmetic number, because the mean of its divisors is an integer number (4973136).

Almost surely, 2^56730220 is an apocalyptic number.

It is an amenable number.

56730220 is an abundant number, since it is smaller than the sum of its proper divisors (62625044).

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

56730220 is a wasteful number, since it uses less digits than its factorization.

56730220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289 (or 5287 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 56730220 is about 7531.9466275326. The cubic root of 56730220 is about 384.2419897592.

Adding to 56730220 its reverse (2203765), we get a palindrome (58933985).

The spelling of 56730220 in words is "fifty-six million, seven hundred thirty thousand, two hundred twenty".