55520868 has 48 divisors (see below), whose sum is σ = 143299520. Its totient is φ = 16619904.

The previous prime is 55520867. The next prime is 55520891. The reversal of 55520868 is 86802555.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (55520867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 963 + ... + 10581.

Almost surely, 2^55520868 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 55520868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71649760).

55520868 is an abundant number, since it is smaller than the sum of its proper divisors (87778652).

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

55520868 is a wasteful number, since it uses less digits than its factorization.

55520868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9676 (or 9674 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 39.

The square root of 55520868 is about 7451.2326497030. The cubic root of 55520868 is about 381.4919829727.

The spelling of 55520868 in words is "fifty-five million, five hundred twenty thousand, eight hundred sixty-eight".