55740 has 24 divisors (see below), whose sum is σ = 156240. Its totient is φ = 14848.

The previous prime is 55733. The next prime is 55763. The reversal of 55740 is 4755.

55740 = 16² + 17² + ... + 55².

It is a congruent number.

It is an unprimeable number.

55740 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 7 ways as a sum of consecutive naturals, for example, 405 + ... + 524.

It is an arithmetic number, because the mean of its divisors is an integer number (6510).

2⁵⁵⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

55740 is an abundant number, since it is smaller than the sum of its proper divisors (100500).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78120).

55740 is a wasteful number, since it uses less digits than its factorization.

55740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941 (or 939 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 55740 is about 236.0932019352. The cubic root of 55740 is about 38.1993220095.

The spelling of 55740 in words is "fifty-five thousand, seven hundred forty".