212340726 has 108 divisors (see below), whose sum is σ = 522171468. Its totient is φ = 62322624.

The previous prime is 212340679. The next prime is 212340757. The reversal of 212340726 is 627043212.

It is a self number, because there is not a number n which added to its sum of digits gives 212340726.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 2558281 + ... + 2558363.

It is an arithmetic number, because the mean of its divisors is an integer number (4834921).

Almost surely, 2^212340726 is an apocalyptic number.

212340726 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 212340726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261085734).

212340726 is an abundant number, since it is smaller than the sum of its proper divisors (309830742).

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

212340726 is a wasteful number, since it uses less digits than its factorization.

212340726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 212340726 is about 14571.9156599261. The cubic root of 212340726 is about 596.5924678427.

Adding to 212340726 its reverse (627043212), we get a palindrome (839383938).

It can be divided in two parts, 2123 and 40726, that added together give a square (42849 = 207²).

The spelling of 212340726 in words is "two hundred twelve million, three hundred forty thousand, seven hundred twenty-six".