55240686 has 12 divisors (see below), whose sum is σ = 119688192. Its totient is φ = 18413556.

The previous prime is 55240643. The next prime is 55240693. The reversal of 55240686 is 68604255.

55240686 is a `hidden beast` number, since 552 + 40 + 68 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55240686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1534446 + ... + 1534481.

It is an arithmetic number, because the mean of its divisors is an integer number (9974016).

Almost surely, 2^55240686 is an apocalyptic number.

55240686 is an abundant number, since it is smaller than the sum of its proper divisors (64447506).

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

55240686 is a wasteful number, since it uses less digits than its factorization.

55240686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068935 (or 3068932 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 55240686 is about 7432.4078198118. The cubic root of 55240686 is about 380.8491766678.

The spelling of 55240686 in words is "fifty-five million, two hundred forty thousand, six hundred eighty-six".