55939520 has 224 divisors, whose sum is σ = 175125888. Its totient is φ = 16515072.

The previous prime is 55939511. The next prime is 55939561. The reversal of 55939520 is 2593955.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494984 + ... + 495096.

It is an arithmetic number, because the mean of its divisors is an integer number (781812).

Almost surely, 2^55939520 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 55939520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87562944).

55939520 is an abundant number, since it is smaller than the sum of its proper divisors (119186368).

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

55939520 is a wasteful number, since it uses less digits than its factorization.

55939520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 38.

The square root of 55939520 is about 7479.2726919133. The cubic root of 55939520 is about 382.4484558964.

The spelling of 55939520 in words is "fifty-five million, nine hundred thirty-nine thousand, five hundred twenty".