722821140 has 36 divisors (see below), whose sum is σ = 2192558004. Its totient is φ = 192752256.

The previous prime is 722821097. The next prime is 722821163. The reversal of 722821140 is 41128227.

It can be written as a sum of positive squares in 2 ways, for example, as 325297296 + 397523844 = 18036^2 + 19938^2 .

It is a tau number, because it is divible by the number of its divisors (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 11 ways as a sum of consecutive naturals, for example, 2007657 + ... + 2008016.

It is an arithmetic number, because the mean of its divisors is an integer number (60904389).

Almost surely, 2^722821140 is an apocalyptic number.

It is an amenable number.

722821140 is an abundant number, since it is smaller than the sum of its proper divisors (1469736864).

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

722821140 is a wasteful number, since it uses less digits than its factorization.

722821140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015688 (or 4015683 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 722821140 is about 26885.3331762878. Note that the first 3 decimals coincide. The cubic root of 722821140 is about 897.4500413167.

Adding to 722821140 its reverse (41128227), we get a palindrome (763949367).

The spelling of 722821140 in words is "seven hundred twenty-two million, eight hundred twenty-one thousand, one hundred forty".