722121072 has 40 divisors (see below), whose sum is σ = 1867149840. Its totient is φ = 240491520.

The previous prime is 722121047. The next prime is 722121077. The reversal of 722121072 is 270121227.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722121077) 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 7 ways as a sum of consecutive naturals, for example, 52872 + ... + 65112.

It is an arithmetic number, because the mean of its divisors is an integer number (46678746).

Almost surely, 2^722121072 is an apocalyptic number.

It is an amenable number.

722121072 is an abundant number, since it is smaller than the sum of its proper divisors (1145028768).

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

722121072 is a wasteful number, since it uses less digits than its factorization.

722121072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13481 (or 13475 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 722121072 is about 26872.3105072861. The cubic root of 722121072 is about 897.1602144319.

Adding to 722121072 its reverse (270121227), we get a palindrome (992242299).

The spelling of 722121072 in words is "seven hundred twenty-two million, one hundred twenty-one thousand, seventy-two".