55866280 has 16 divisors (see below), whose sum is σ = 125699220. Its totient is φ = 22346496.

The previous prime is 55866257. The next prime is 55866281. The reversal of 55866280 is 8266855.

55866280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50211396 + 5654884 = 7086^2 + 2378^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1396657 = 55866280 / (5 + 5 + 8 + 6 + 6 + 2 + 8 + 0).

It is not an unprimeable number, because it can be changed into a prime (55866281) 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 3 ways as a sum of consecutive naturals, for example, 698289 + ... + 698368.

Almost surely, 2^55866280 is an apocalyptic number.

It is an amenable number.

55866280 is an abundant number, since it is smaller than the sum of its proper divisors (69832940).

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

55866280 is a wasteful number, since it uses less digits than its factorization.

55866280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396668 (or 1396664 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 55866280 is about 7474.3748902500. The cubic root of 55866280 is about 382.2814734228.

The spelling of 55866280 in words is "fifty-five million, eight hundred sixty-six thousand, two hundred eighty".