55320760 has 64 divisors (see below), whose sum is σ = 138153600. Its totient is φ = 19766400.

The previous prime is 55320731. The next prime is 55320779. The reversal of 55320760 is 6702355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24895 + ... + 27025.

It is an arithmetic number, because the mean of its divisors is an integer number (2158650).

Almost surely, 2^55320760 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 55320760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69076800).

55320760 is an abundant number, since it is smaller than the sum of its proper divisors (82832840).

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

55320760 is a wasteful number, since it uses less digits than its factorization.

55320760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212 (or 2208 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 55320760 is about 7437.7926833167. The cubic root of 55320760 is about 381.0331074855.

The spelling of 55320760 in words is "fifty-five million, three hundred twenty thousand, seven hundred sixty".