55189386 has 60 divisors (see below), whose sum is σ = 139607442. Its totient is φ = 15756048.

The previous prime is 55189363. The next prime is 55189399. The reversal of 55189386 is 68398155.

55189386 is a `hidden beast` number, since 551 + 8 + 93 + 8 + 6 = 666.

55189386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 43758225 + 11431161 = 6615^2 + 3381^2 .

It is a super-3 number, since 3×55189386³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

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 29 ways as a sum of consecutive naturals, for example, 42580 + ... + 43856.

Almost surely, 2^55189386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55189386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69803721).

55189386 is an abundant number, since it is smaller than the sum of its proper divisors (84418056).

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

55189386 is a wasteful number, since it uses less digits than its factorization.

55189386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313 (or 1289 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 55189386 is about 7428.9559158740. The cubic root of 55189386 is about 380.7312465983.

The spelling of 55189386 in words is "fifty-five million, one hundred eighty-nine thousand, three hundred eighty-six".