55320408 has 192 divisors, whose sum is σ = 183456000. Its totient is φ = 15396480.

The previous prime is 55320379. The next prime is 55320409. The reversal of 55320408 is 80402355.

55320408 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 (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55320409) 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 47 ways as a sum of consecutive naturals, for example, 277893 + ... + 278091.

It is an arithmetic number, because the mean of its divisors is an integer number (955500).

Almost surely, 2^55320408 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 55320408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91728000).

55320408 is an abundant number, since it is smaller than the sum of its proper divisors (128135592).

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

55320408 is a wasteful number, since it uses less digits than its factorization.

55320408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 228 counting only the distinct ones).

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

The square root of 55320408 is about 7437.7690203447. The cubic root of 55320408 is about 381.0322993263.

The spelling of 55320408 in words is "fifty-five million, three hundred twenty thousand, four hundred eight".