9689209440 has 96 divisors (see below), whose sum is σ = 30552119136. Its totient is φ = 2581155840.

The previous prime is 9689209423. The next prime is 9689209447. The reversal of 9689209440 is 449029869.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×9689209440² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9689209447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486070 + ... + 505610.

It is an arithmetic number, because the mean of its divisors is an integer number (318251241).

Almost surely, 2^9689209440 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 9689209440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15276059568).

9689209440 is an abundant number, since it is smaller than the sum of its proper divisors (20862909696).

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

9689209440 is a wasteful number, since it uses less digits than its factorization.

9689209440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20592 (or 20584 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 9689209440 is about 98433.7820059760. The cubic root of 9689209440 is about 2131.8801270680.

The spelling of 9689209440 in words is "nine billion, six hundred eighty-nine million, two hundred nine thousand, four hundred forty".