55603880 has 64 divisors (see below), whose sum is σ = 137462400. Its totient is φ = 20148480.

The previous prime is 55603853. The next prime is 55603883. The reversal of 55603880 is 8830655.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55603880.

It is not an unprimeable number, because it can be changed into a prime (55603883) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15890 + ... + 19070.

It is an arithmetic number, because the mean of its divisors is an integer number (2147850).

Almost surely, 2^55603880 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 55603880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68731200).

55603880 is an abundant number, since it is smaller than the sum of its proper divisors (81858520).

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

55603880 is a wasteful number, since it uses less digits than its factorization.

55603880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234 (or 3230 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 55603880 is about 7456.8009226477. The cubic root of 55603880 is about 381.6820174812.

The spelling of 55603880 in words is "fifty-five million, six hundred three thousand, eight hundred eighty".