55278800 has 30 divisors (see below), whose sum is σ = 132808278. Its totient is φ = 22111360.

The previous prime is 55278799. The next prime is 55278803. The reversal of 55278800 is 887255.

It can be written as a sum of positive squares in 3 ways, for example, as 341056 + 54937744 = 584^2 + 7412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55278803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68699 + ... + 69498.

Almost surely, 2^55278800 is an apocalyptic number.

55278800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55278800 is an abundant number, since it is smaller than the sum of its proper divisors (77529478).

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

55278800 is a wasteful number, since it uses less digits than its factorization.

55278800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138215 (or 138204 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 55278800 is about 7434.9714189094. The cubic root of 55278800 is about 380.9367470767.

The spelling of 55278800 in words is "fifty-five million, two hundred seventy-eight thousand, eight hundred".