55389888 has 168 divisors, whose sum is σ = 171651168. Its totient is φ = 17031168.

The previous prime is 55389853. The next prime is 55389931. The reversal of 55389888 is 88898355.

55389888 is a `hidden beast` number, since 553 + 8 + 9 + 8 + 88 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490120 + ... + 490232.

Almost surely, 2^55389888 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 55389888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85825584).

55389888 is an abundant number, since it is smaller than the sum of its proper divisors (116261280).

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

55389888 is a wasteful number, since it uses less digits than its factorization.

55389888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 178 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The square root of 55389888 is about 7442.4383101239. The cubic root of 55389888 is about 381.1917525275.

The spelling of 55389888 in words is "fifty-five million, three hundred eighty-nine thousand, eight hundred eighty-eight".