55730 has 8 divisors (see below), whose sum is σ = 100332. Its totient is φ = 22288.

The previous prime is 55721. The next prime is 55733. The reversal of 55730 is 3755.

It can be written as a sum of positive squares in 2 ways, for example, as 48841 + 6889 = 221^2 + 83^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55730.

It is not an unprimeable number, because it can be changed into a prime (55733) by changing a digit.

55730 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777 + ... + 2796.

2⁵⁵⁷³⁰ is an apocalyptic number.

55730 is a deficient number, since it is larger than the sum of its proper divisors (44602).

55730 is a wasteful number, since it uses less digits than its factorization.

55730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580.

The product of its (nonzero) digits is 525, while the sum is 20.

The square root of 55730 is about 236.0720229083. The cubic root of 55730 is about 38.1970374977.

The spelling of 55730 in words is "fifty-five thousand, seven hundred thirty".