721952652 has 48 divisors (see below), whose sum is σ = 1777104000. Its totient is φ = 227485440.

The previous prime is 721952587. The next prime is 721952653. The reversal of 721952652 is 256259127.

It is a self number, because there is not a number n which added to its sum of digits gives 721952652.

It is not an unprimeable number, because it can be changed into a prime (721952653) 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 15 ways as a sum of consecutive naturals, for example, 108724 + ... + 115172.

It is an arithmetic number, because the mean of its divisors is an integer number (37023000).

Almost surely, 2^721952652 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 721952652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (888552000).

721952652 is an abundant number, since it is smaller than the sum of its proper divisors (1055151348).

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

721952652 is a wasteful number, since it uses less digits than its factorization.

721952652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966 (or 6964 counting only the distinct ones).

The product of its digits is 75600, while the sum is 39.

The square root of 721952652 is about 26869.1766155943. The cubic root of 721952652 is about 897.0904609064.

It can be divided in two parts, 72195 and 2652, that added together give a palindrome (74847).

The spelling of 721952652 in words is "seven hundred twenty-one million, nine hundred fifty-two thousand, six hundred fifty-two".