855244800 has 324 divisors, whose sum is σ = 3169308870. Its totient is φ = 220200960.

The previous prime is 855244799. The next prime is 855244807. The reversal of 855244800 is 8442558.

It can be written as a sum of positive squares in 3 ways, for example, as 642318336 + 212926464 = 25344^2 + 14592^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (855244807) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 29491186 + ... + 29491214.

Almost surely, 2^855244800 is an apocalyptic number.

855244800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855244800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584654435).

855244800 is an abundant number, since it is smaller than the sum of its proper divisors (2314064070).

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

855244800 is an equidigital number, since it uses as much as digits as its factorization.

855244800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 855244800 is about 29244.5687265174. The cubic root of 855244800 is about 949.2125700304.

The spelling of 855244800 in words is "eight hundred fifty-five million, two hundred forty-four thousand, eight hundred".