722243808 has 432 divisors, whose sum is σ = 2589874560. Its totient is φ = 188697600.

The previous prime is 722243777. The next prime is 722243881. The reversal of 722243808 is 808342227.

It is a super-2 number, since 2×722243808² = 1043272236388681728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10172413 + ... + 10172483.

It is an arithmetic number, because the mean of its divisors is an integer number (5995080).

Almost surely, 2^722243808 is an apocalyptic number.

722243808 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722243808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294937280).

722243808 is an abundant number, since it is smaller than the sum of its proper divisors (1867630752).

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

722243808 is a wasteful number, since it uses less digits than its factorization.

722243808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 722243808 is about 26874.5940992604. The cubic root of 722243808 is about 897.2110404510.

The spelling of 722243808 in words is "seven hundred twenty-two million, two hundred forty-three thousand, eight hundred eight".