9621089280 has 1056 divisors, whose sum is σ = 40772309760. Its totient is φ = 2149908480.

The previous prime is 9621089263. The next prime is 9621089287. The reversal of 9621089280 is 829801269.

It is a tau number, because it is divible by the number of its divisors (1056).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9621089287) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 260029422 + ... + 260029458.

Almost surely, 2^9621089280 is an apocalyptic number.

9621089280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9621089280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20386154880).

9621089280 is an abundant number, since it is smaller than the sum of its proper divisors (31151220480).

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

9621089280 is a wasteful number, since it uses less digits than its factorization.

9621089280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 9621089280 is about 98087.1514521652. The cubic root of 9621089280 is about 2126.8722990248.

The spelling of 9621089280 in words is "nine billion, six hundred twenty-one million, eighty-nine thousand, two hundred eighty".