9897026328 has 96 divisors (see below), whose sum is σ = 30762201600. Its totient is φ = 2815856064.

The previous prime is 9897026287. The next prime is 9897026387. The reversal of 9897026328 is 8236207989.

It is a happy number.

It is a super-2 number, since 2×9897026328² (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 23 ways as a sum of consecutive naturals, for example, 79375 + ... + 161537.

It is an arithmetic number, because the mean of its divisors is an integer number (320439600).

Almost surely, 2^9897026328 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 9897026328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15381100800).

9897026328 is an abundant number, since it is smaller than the sum of its proper divisors (20865175272).

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

9897026328 is a wasteful number, since it uses less digits than its factorization.

9897026328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82421 (or 82414 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 9897026328 is about 99483.7993243121. The cubic root of 9897026328 is about 2147.0141590974.

The spelling of 9897026328 in words is "nine billion, eight hundred ninety-seven million, twenty-six thousand, three hundred twenty-eight".