722218208 has 48 divisors (see below), whose sum is σ = 1508283504. Its totient is φ = 339240960.

The previous prime is 722218201. The next prime is 722218213. The reversal of 722218208 is 802812227.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722218201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440366 + ... + 442002.

It is an arithmetic number, because the mean of its divisors is an integer number (31422573).

Almost surely, 2^722218208 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 722218208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754141752).

722218208 is an abundant number, since it is smaller than the sum of its proper divisors (786065296).

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

722218208 is a wasteful number, since it uses less digits than its factorization.

722218208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475 (or 2467 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 722218208 is about 26874.1178087765. The cubic root of 722218208 is about 897.2004397490.

The spelling of 722218208 in words is "seven hundred twenty-two million, two hundred eighteen thousand, two hundred eight".