55727280 has 120 divisors (see below), whose sum is σ = 213905952. Its totient is φ = 12736512.

The previous prime is 55727267. The next prime is 55727281. The reversal of 55727280 is 8272755.

55727280 is a `hidden beast` number, since 5 + 572 + 7 + 2 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (55727281) 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 23 ways as a sum of consecutive naturals, for example, 489 + ... + 10568.

Almost surely, 2^55727280 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 55727280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106952976).

55727280 is an abundant number, since it is smaller than the sum of its proper divisors (158178672).

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

55727280 is a wasteful number, since it uses less digits than its factorization.

55727280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11083 (or 11074 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 55727280 is about 7465.0706627600. The cubic root of 55727280 is about 381.9641606317.

The spelling of 55727280 in words is "fifty-five million, seven hundred twenty-seven thousand, two hundred eighty".