9697728444 has 24 divisors (see below), whose sum is σ = 22701748608. Its totient is φ = 3222045360.

The previous prime is 9697728433. The next prime is 9697728463. The reversal of 9697728444 is 4448277969.

It is a super-2 number, since 2×9697728444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1312512 + ... + 1319879.

It is an arithmetic number, because the mean of its divisors is an integer number (945906192).

Almost surely, 2^9697728444 is an apocalyptic number.

It is an amenable number.

9697728444 is an abundant number, since it is smaller than the sum of its proper divisors (13004020164).

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

9697728444 is a wasteful number, since it uses less digits than its factorization.

9697728444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632705 (or 2632703 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 60.

The square root of 9697728444 is about 98477.0452643661. The cubic root of 9697728444 is about 2132.5047454594.

The spelling of 9697728444 in words is "nine billion, six hundred ninety-seven million, seven hundred twenty-eight thousand, four hundred forty-four".