55711880 has 32 divisors (see below), whose sum is σ = 143259840. Its totient is φ = 19101120.

The previous prime is 55711879. The next prime is 55711883. The reversal of 55711880 is 8811755.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 55711880.

It is not an unprimeable number, because it can be changed into a prime (55711883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99206 + ... + 99765.

It is an arithmetic number, because the mean of its divisors is an integer number (4476870).

Almost surely, 2^55711880 is an apocalyptic number.

It is an amenable number.

55711880 is an abundant number, since it is smaller than the sum of its proper divisors (87547960).

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

55711880 is a wasteful number, since it uses less digits than its factorization.

55711880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198989 (or 198985 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 35.

The square root of 55711880 is about 7464.0391210122. The cubic root of 55711880 is about 381.9289726591.

The spelling of 55711880 in words is "fifty-five million, seven hundred eleven thousand, eight hundred eighty".