55680880 has 40 divisors (see below), whose sum is σ = 129826512. Its totient is φ = 22209024.

The previous prime is 55680871. The next prime is 55680913. The reversal of 55680880 is 8808655.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35799 + ... + 37321.

Almost surely, 2^55680880 is an apocalyptic number.

It is an amenable number.

55680880 is an abundant number, since it is smaller than the sum of its proper divisors (74145632).

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

55680880 is a wasteful number, since it uses less digits than its factorization.

55680880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1987 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 55680880 is about 7461.9622084275. The cubic root of 55680880 is about 381.8581200579.

The spelling of 55680880 in words is "fifty-five million, six hundred eighty thousand, eight hundred eighty".