7212343638 has 8 divisors (see below), whose sum is σ = 14424687288. Its totient is φ = 2404114544.

The previous prime is 7212343613. The next prime is 7212343639. The reversal of 7212343638 is 8363432127.

It is a sphenic number, since it is the product of 3 distinct primes.

7212343638 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 7212343596 and 7212343605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7212343639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601028631 + ... + 601028642.

It is an arithmetic number, because the mean of its divisors is an integer number (1803085911).

Almost surely, 2^7212343638 is an apocalyptic number.

7212343638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7212343638 is a wasteful number, since it uses less digits than its factorization.

7212343638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202057278.

The product of its digits is 145152, while the sum is 39.

The square root of 7212343638 is about 84925.5181791669. The cubic root of 7212343638 is about 1932.0816254537.

The spelling of 7212343638 in words is "seven billion, two hundred twelve million, three hundred forty-three thousand, six hundred thirty-eight".