212004340 has 48 divisors (see below), whose sum is σ = 465937920. Its totient is φ = 80875520.

The previous prime is 212004301. The next prime is 212004347. The reversal of 212004340 is 43400212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212004347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294501 + ... + 295219.

It is an arithmetic number, because the mean of its divisors is an integer number (9707040).

Almost surely, 2^212004340 is an apocalyptic number.

212004340 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 212004340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232968960).

212004340 is an abundant number, since it is smaller than the sum of its proper divisors (253933580).

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

212004340 is a wasteful number, since it uses less digits than its factorization.

212004340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 212004340 is about 14560.3688140102. The cubic root of 212004340 is about 596.2772646549.

Adding to 212004340 its reverse (43400212), we get a palindrome (255404552).

The spelling of 212004340 in words is "two hundred twelve million, four thousand, three hundred forty".