55418400 has 216 divisors, whose sum is σ = 201080880. Its totient is φ = 14353920.

The previous prime is 55418387. The next prime is 55418401. The reversal of 55418400 is 481455.

It is not an unprimeable number, because it can be changed into a prime (55418401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 309511 + ... + 309689.

It is an arithmetic number, because the mean of its divisors is an integer number (930930).

Almost surely, 2^55418400 is an apocalyptic number.

55418400 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 55418400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100540440).

55418400 is an abundant number, since it is smaller than the sum of its proper divisors (145662480).

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

55418400 is a wasteful number, since it uses less digits than its factorization.

55418400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 55418400 is about 7444.3535649511. The cubic root of 55418400 is about 381.2571475861.

Adding to 55418400 its reverse (481455), we get a palindrome (55899855).

The spelling of 55418400 in words is "fifty-five million, four hundred eighteen thousand, four hundred".