55480320 has 312 divisors, whose sum is σ = 224892096. Its totient is φ = 12386304.

The previous prime is 55480319. The next prime is 55480349. The reversal of 55480320 is 2308455.

55480320 is a `hidden beast` number, since 554 + 80 + 32 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1290219 + ... + 1290261.

It is an arithmetic number, because the mean of its divisors is an integer number (720808).

Almost surely, 2^55480320 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 55480320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112446048).

55480320 is an abundant number, since it is smaller than the sum of its proper divisors (169411776).

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

55480320 is a wasteful number, since it uses less digits than its factorization.

55480320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 55480320 is about 7448.5112606480. The cubic root of 55480320 is about 381.3990899476.

Adding to 55480320 its reverse (2308455), we get a palindrome (57788775).

The spelling of 55480320 in words is "fifty-five million, four hundred eighty thousand, three hundred twenty".