55388268 has 72 divisors (see below), whose sum is σ = 158740400. Its totient is φ = 16142976.

The previous prime is 55388219. The next prime is 55388269. The reversal of 55388268 is 86288355.

It is a happy number.

55388268 is a `hidden beast` number, since 5 + 5 + 388 + 268 = 666.

It is not an unprimeable number, because it can be changed into a prime (55388269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5778 + ... + 12006.

Almost surely, 2^55388268 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 55388268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79370200).

55388268 is an abundant number, since it is smaller than the sum of its proper divisors (103352132).

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

55388268 is a wasteful number, since it uses less digits than its factorization.

55388268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6271 (or 6266 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 55388268 is about 7442.3294740289. The cubic root of 55388268 is about 381.1880362255.

The spelling of 55388268 in words is "fifty-five million, three hundred eighty-eight thousand, two hundred sixty-eight".