7212343640 has 64 divisors (see below), whose sum is σ = 16820697600. Its totient is φ = 2781364608.

The previous prime is 7212343639. The next prime is 7212343651. The reversal of 7212343640 is 463432127.

It is a junction number, because it is equal to n+sod(n) for n = 7212343597 and 7212343606.

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 15 ways as a sum of consecutive naturals, for example, 97331 + ... + 154589.

It is an arithmetic number, because the mean of its divisors is an integer number (262823400).

Almost surely, 2^7212343640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7212343640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8410348800).

7212343640 is an abundant number, since it is smaller than the sum of its proper divisors (9608353960).

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

7212343640 is a wasteful number, since it uses less digits than its factorization.

7212343640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57384 (or 57380 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 7212343640 is about 84925.5181909419. The cubic root of 7212343640 is about 1932.0816256323.

Adding to 7212343640 its reverse (463432127), we get a palindrome (7675775767).

The spelling of 7212343640 in words is "seven billion, two hundred twelve million, three hundred forty-three thousand, six hundred forty".