55550404 has 48 divisors (see below), whose sum is σ = 120911616. Its totient is φ = 21744000.

The previous prime is 55550371. The next prime is 55550423. The reversal of 55550404 is 40405555.

55550404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 15 ways as a sum of consecutive naturals, for example, 36009 + ... + 37519.

It is an arithmetic number, because the mean of its divisors is an integer number (2518992).

Almost surely, 2^55550404 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 55550404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60455808).

55550404 is an abundant number, since it is smaller than the sum of its proper divisors (65361212).

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

55550404 is a wasteful number, since it uses less digits than its factorization.

55550404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 55550404 is about 7453.2143401354. The cubic root of 55550404 is about 381.5596197018.

Adding to 55550404 its reverse (40405555), we get a palindrome (95955959).

The spelling of 55550404 in words is "fifty-five million, five hundred fifty thousand, four hundred four".