212104440 has 128 divisors (see below), whose sum is σ = 710568000. Its totient is φ = 56277504.

The previous prime is 212104397. The next prime is 212104447. The reversal of 212104440 is 44401212.

212104440 is a `hidden beast` number, since 212 + 10 + 4 + 440 = 666.

212104440 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 (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212104447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298806 + ... + 299514.

Almost surely, 2^212104440 is an apocalyptic number.

212104440 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 212104440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355284000).

212104440 is an abundant number, since it is smaller than the sum of its proper divisors (498463560).

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

212104440 is a wasteful number, since it uses less digits than its factorization.

212104440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 996 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 212104440 is about 14563.8058212817. The cubic root of 212104440 is about 596.3710960086.

Adding to 212104440 its reverse (44401212), we get a palindrome (256505652).

The spelling of 212104440 in words is "two hundred twelve million, one hundred four thousand, four hundred forty".