722147140 has 72 divisors (see below), whose sum is σ = 1791514368. Its totient is φ = 242386560.

The previous prime is 722147113. The next prime is 722147141. The reversal of 722147140 is 41741227.

It is a junction number, because it is equal to n+sod(n) for n = 722147099 and 722147108.

It is not an unprimeable number, because it can be changed into a prime (722147141) 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 23 ways as a sum of consecutive naturals, for example, 27469 + ... + 46891.

It is an arithmetic number, because the mean of its divisors is an integer number (24882144).

Almost surely, 2^722147140 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 722147140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895757184).

722147140 is an abundant number, since it is smaller than the sum of its proper divisors (1069367228).

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

722147140 is a wasteful number, since it uses less digits than its factorization.

722147140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19469 (or 19454 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 722147140 is about 26872.7955374948. The cubic root of 722147140 is about 897.1710098936.

Adding to 722147140 its reverse (41741227), we get a palindrome (763888367).

The spelling of 722147140 in words is "seven hundred twenty-two million, one hundred forty-seven thousand, one hundred forty".