722187648 has 288 divisors, whose sum is σ = 2588935440. Its totient is φ = 188172288.

The previous prime is 722187643. The next prime is 722187679. The reversal of 722187648 is 846781227.

It is a tau number, because it is divible by the number of its divisors (288).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722187643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8701015 + ... + 8701097.

Almost surely, 2^722187648 is an apocalyptic number.

722187648 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 722187648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294467720).

722187648 is an abundant number, since it is smaller than the sum of its proper divisors (1866747792).

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

722187648 is a wasteful number, since it uses less digits than its factorization.

722187648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 108 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 722187648 is about 26873.5492259582. The cubic root of 722187648 is about 897.1877848331.

The spelling of 722187648 in words is "seven hundred twenty-two million, one hundred eighty-seven thousand, six hundred forty-eight".