722720672 has 12 divisors (see below), whose sum is σ = 1422856386. Its totient is φ = 361360320.

The previous prime is 722720671. The next prime is 722720683. The reversal of 722720672 is 276027227.

722720672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 713744656 + 8976016 = 26716^2 + 2996^2 .

It is a super-2 number, since 2×722720672² = 1044650339472263168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (722720671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11292479 + ... + 11292542.

Almost surely, 2^722720672 is an apocalyptic number.

It is an amenable number.

722720672 is a deficient number, since it is larger than the sum of its proper divisors (700135714).

722720672 is a wasteful number, since it uses less digits than its factorization.

722720672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22585031 (or 22585023 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 722720672 is about 26883.4646576664. The cubic root of 722720672 is about 897.4084592509.

Adding to 722720672 its reverse (276027227), we get a palindrome (998747899).

The spelling of 722720672 in words is "seven hundred twenty-two million, seven hundred twenty thousand, six hundred seventy-two".