55007800 has 24 divisors (see below), whose sum is σ = 127893600. Its totient is φ = 22003040.

The previous prime is 55007791. The next prime is 55007807. The reversal of 55007800 is 870055.

55007800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55007807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137320 + ... + 137719.

It is an arithmetic number, because the mean of its divisors is an integer number (5328900).

Almost surely, 2^55007800 is an apocalyptic number.

55007800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55007800 is an abundant number, since it is smaller than the sum of its proper divisors (72885800).

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

55007800 is a wasteful number, since it uses less digits than its factorization.

55007800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275055 (or 275046 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 55007800 is about 7416.7243443450. The cubic root of 55007800 is about 380.3132228198.

Adding to 55007800 its reverse (870055), we get a palindrome (55877855).

The spelling of 55007800 in words is "fifty-five million, seven thousand, eight hundred".