55086720 has 128 divisors (see below), whose sum is σ = 189181440. Its totient is φ = 13553664.

The previous prime is 55086701. The next prime is 55086737. The reversal of 55086720 is 2768055.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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, 23857 + ... + 26063.

It is an arithmetic number, because the mean of its divisors is an integer number (1477980).

Almost surely, 2^55086720 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 55086720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94590720).

55086720 is an abundant number, since it is smaller than the sum of its proper divisors (134094720).

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

55086720 is a wasteful number, since it uses less digits than its factorization.

55086720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242 (or 2230 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 55086720 is about 7422.0428454705. The cubic root of 55086720 is about 380.4950150812.

The spelling of 55086720 in words is "fifty-five million, eighty-six thousand, seven hundred twenty".