55555488 has 72 divisors (see below), whose sum is σ = 164874528. Its totient is φ = 17711232.

The previous prime is 55555481. The next prime is 55555517. The reversal of 55555488 is 88455555.

55555488 is a `hidden beast` number, since 55 + 55 + 548 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (55555481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2431 + ... + 10817.

It is an arithmetic number, because the mean of its divisors is an integer number (2289924).

Almost surely, 2^55555488 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 55555488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82437264).

55555488 is an abundant number, since it is smaller than the sum of its proper divisors (109319040).

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

55555488 is a wasteful number, since it uses less digits than its factorization.

55555488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8426 (or 8415 counting only the distinct ones).

The product of its digits is 800000, while the sum is 45.

The square root of 55555488 is about 7453.5553932335. Note that the first 3 decimals coincide. The cubic root of 55555488 is about 381.5712595208.

The spelling of 55555488 in words is "fifty-five million, five hundred fifty-five thousand, four hundred eighty-eight".