55404000 has 336 divisors, whose sum is σ = 214840080. Its totient is φ = 13996800.

The previous prime is 55403977. The next prime is 55404001. The reversal of 55404000 is 40455.

It is a happy number.

55404000 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 (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55404001) 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 55 ways as a sum of consecutive naturals, for example, 2915991 + ... + 2916009.

It is an arithmetic number, because the mean of its divisors is an integer number (639405).

Almost surely, 2^55404000 is an apocalyptic number.

55404000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55404000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107420040).

55404000 is an abundant number, since it is smaller than the sum of its proper divisors (159436080).

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

55404000 is an equidigital number, since it uses as much as digits as its factorization.

55404000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 55404000 is about 7443.3863261287. The cubic root of 55404000 is about 381.2241225829.

Adding to 55404000 its reverse (40455), we get a palindrome (55444455).

The spelling of 55404000 in words is "fifty-five million, four hundred four thousand".