722043720 has 160 divisors (see below), whose sum is σ = 2569822200. Its totient is φ = 181204992.

The previous prime is 722043697. The next prime is 722043727. The reversal of 722043720 is 27340227.

722043720 is a `hidden beast` number, since 7 + 220 + 437 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 625100004 + 96943716 = 25002^2 + 9846^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (722043727) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 48526 + ... + 61634.

Almost surely, 2^722043720 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 722043720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1284911100).

722043720 is an abundant number, since it is smaller than the sum of its proper divisors (1847778480).

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

722043720 is a wasteful number, since it uses less digits than its factorization.

722043720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13149 (or 13136 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 722043720 is about 26870.8712177332. The cubic root of 722043720 is about 897.1281793537.

Adding to 722043720 its reverse (27340227), we get a palindrome (749383947).

The spelling of 722043720 in words is "seven hundred twenty-two million, forty-three thousand, seven hundred twenty".