55548780 has 96 divisors (see below), whose sum is σ = 187138560. Its totient is φ = 12026880.

The previous prime is 55548739. The next prime is 55548781. The reversal of 55548780 is 8784555.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (55548781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4500 + ... + 11460.

It is an arithmetic number, because the mean of its divisors is an integer number (1949360).

Almost surely, 2^55548780 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 55548780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93569280).

55548780 is an abundant number, since it is smaller than the sum of its proper divisors (131589780).

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

55548780 is a wasteful number, since it uses less digits than its factorization.

55548780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999 (or 6997 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 55548780 is about 7453.1053930560. The cubic root of 55548780 is about 381.5559014039. Note that the first 3 decimals are identical.

The spelling of 55548780 in words is "fifty-five million, five hundred forty-eight thousand, seven hundred eighty".