55730688 has 80 divisors (see below), whose sum is σ = 159948096. Its totient is φ = 17141760.

The previous prime is 55730687. The next prime is 55730711. The reversal of 55730688 is 88603755.

It is not an unprimeable number, because it can be changed into a prime (55730683) 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, 18573 + ... + 21363.

Almost surely, 2^55730688 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 55730688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79974048).

55730688 is an abundant number, since it is smaller than the sum of its proper divisors (104217408).

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

55730688 is a wasteful number, since it uses less digits than its factorization.

55730688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825 (or 2809 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 55730688 is about 7465.2989223473. The cubic root of 55730688 is about 381.9719468082.

The spelling of 55730688 in words is "fifty-five million, seven hundred thirty thousand, six hundred eighty-eight".