55680720 has 40 divisors (see below), whose sum is σ = 172610976. Its totient is φ = 14848128.

The previous prime is 55680689. The next prime is 55680727. The reversal of 55680720 is 2708655.

It is a happy number.

55680720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55680727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115762 + ... + 116241.

Almost surely, 2^55680720 is an apocalyptic number.

It is an amenable number.

55680720 is an abundant number, since it is smaller than the sum of its proper divisors (116930256).

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

55680720 is a wasteful number, since it uses less digits than its factorization.

55680720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232019 (or 232013 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 55680720 is about 7461.9514873792. The cubic root of 55680720 is about 381.8577542988.

The spelling of 55680720 in words is "fifty-five million, six hundred eighty thousand, seven hundred twenty".