55943680 has 120 divisors (see below), whose sum is σ = 148060836. Its totient is φ = 20152320.

The previous prime is 55943663. The next prime is 55943707. The reversal of 55943680 is 8634955.

It can be written as a sum of positive squares in 6 ways, for example, as 112896 + 55830784 = 336^2 + 7472^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1364460 + ... + 1364500.

Almost surely, 2^55943680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55943680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74030418).

55943680 is an abundant number, since it is smaller than the sum of its proper divisors (92117156).

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

55943680 is an equidigital number, since it uses as much as digits as its factorization.

55943680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 55943680 is about 7479.5507886503. The cubic root of 55943680 is about 382.4579360524.

The spelling of 55943680 in words is "fifty-five million, nine hundred forty-three thousand, six hundred eighty".