55953920 has 80 divisors (see below), whose sum is σ = 146428128. Its totient is φ = 20336640.

The previous prime is 55953907. The next prime is 55953929. The reversal of 55953920 is 2935955.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (55953929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27167 + ... + 29153.

Almost surely, 2^55953920 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 55953920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73214064).

55953920 is an abundant number, since it is smaller than the sum of its proper divisors (90474208).

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

55953920 is a wasteful number, since it uses less digits than its factorization.

55953920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021 (or 2005 counting only the distinct ones).

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

The square root of 55953920 is about 7480.2352904170. The cubic root of 55953920 is about 382.4812698192.

The spelling of 55953920 in words is "fifty-five million, nine hundred fifty-three thousand, nine hundred twenty".