212728800 has 144 divisors (see below), whose sum is σ = 698205312. Its totient is φ = 56256000.

The previous prime is 212728759. The next prime is 212728823. The reversal of 212728800 is 8827212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 362107 + ... + 362693.

It is an arithmetic number, because the mean of its divisors is an integer number (4848648).

Almost surely, 2^212728800 is an apocalyptic number.

212728800 is a gapful number since it is divisible by the number (20) 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 212728800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349102656).

212728800 is an abundant number, since it is smaller than the sum of its proper divisors (485476512).

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

212728800 is a wasteful number, since it uses less digits than its factorization.

212728800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 212728800 is about 14585.2254010694. The cubic root of 212728800 is about 596.9556908718.

The spelling of 212728800 in words is "two hundred twelve million, seven hundred twenty-eight thousand, eight hundred".