55785688 has 16 divisors (see below), whose sum is σ = 119540880. Its totient is φ = 23908128.

The previous prime is 55785683. The next prime is 55785701. The reversal of 55785688 is 88658755.

55785688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55785688² = 6224085971266688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55785683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498031 + ... + 498142.

It is an arithmetic number, because the mean of its divisors is an integer number (7471305).

Almost surely, 2^55785688 is an apocalyptic number.

It is an amenable number.

55785688 is an abundant number, since it is smaller than the sum of its proper divisors (63755192).

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

55785688 is a wasteful number, since it uses less digits than its factorization.

55785688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996186 (or 996182 counting only the distinct ones).

The product of its digits is 2688000, while the sum is 52.

The square root of 55785688 is about 7468.9817244387. The cubic root of 55785688 is about 382.0975601260.

The spelling of 55785688 in words is "fifty-five million, seven hundred eighty-five thousand, six hundred eighty-eight".