722216340 has 72 divisors (see below), whose sum is σ = 2194133760. Its totient is φ = 192291264.

The previous prime is 722216323. The next prime is 722216351. The reversal of 722216340 is 43612227.

722216340 is a `hidden beast` number, since 7 + 2 + 2 + 21 + 634 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128101 + ... + 133619.

It is an arithmetic number, because the mean of its divisors is an integer number (30474080).

Almost surely, 2^722216340 is an apocalyptic number.

It is an amenable number.

722216340 is an abundant number, since it is smaller than the sum of its proper divisors (1471917420).

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

722216340 is a wasteful number, since it uses less digits than its factorization.

722216340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6261 (or 6256 counting only the distinct ones).

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

The square root of 722216340 is about 26874.0830541248. The cubic root of 722216340 is about 897.1996662193.

Adding to 722216340 its reverse (43612227), we get a palindrome (765828567).

The spelling of 722216340 in words is "seven hundred twenty-two million, two hundred sixteen thousand, three hundred forty".