55656240 has 40 divisors (see below), whose sum is σ = 172535088. Its totient is φ = 14841600.

The previous prime is 55656221. The next prime is 55656247. The reversal of 55656240 is 4265655.

It is a happy number.

55656240 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 not an unprimeable number, because it can be changed into a prime (55656247) 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, 115711 + ... + 116190.

Almost surely, 2^55656240 is an apocalyptic number.

It is an amenable number.

55656240 is an abundant number, since it is smaller than the sum of its proper divisors (116878848).

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

55656240 is a wasteful number, since it uses less digits than its factorization.

55656240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231917 (or 231911 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 55656240 is about 7460.3109854751. The cubic root of 55656240 is about 381.8017849071.

The spelling of 55656240 in words is "fifty-five million, six hundred fifty-six thousand, two hundred forty".