55843720 has 16 divisors (see below), whose sum is σ = 125648460. Its totient is φ = 22337472.

The previous prime is 55843663. The next prime is 55843729. The reversal of 55843720 is 2734855.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 53611684 + 2232036 = 7322^2 + 1494^2 .

It is not an unprimeable number, because it can be changed into a prime (55843729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698007 + ... + 698086.

Almost surely, 2^55843720 is an apocalyptic number.

It is an amenable number.

55843720 is an abundant number, since it is smaller than the sum of its proper divisors (69804740).

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

55843720 is a wasteful number, since it uses less digits than its factorization.

55843720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396104 (or 1396100 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 55843720 is about 7472.8655815557. The cubic root of 55843720 is about 382.2300086800.

The spelling of 55843720 in words is "fifty-five million, eight hundred forty-three thousand, seven hundred twenty".