9890645424 has 160 divisors (see below), whose sum is σ = 29611319040. Its totient is φ = 2811494400.

The previous prime is 9890645419. The next prime is 9890645507. The reversal of 9890645424 is 4245460989.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2969392 + ... + 2972720.

It is an arithmetic number, because the mean of its divisors is an integer number (185070744).

Almost surely, 2^9890645424 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 9890645424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14805659520).

9890645424 is an abundant number, since it is smaller than the sum of its proper divisors (19720673616).

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

9890645424 is a wasteful number, since it uses less digits than its factorization.

9890645424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699 (or 3693 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The square root of 9890645424 is about 99451.7240876195. The cubic root of 9890645424 is about 2146.5526455048.

The spelling of 9890645424 in words is "nine billion, eight hundred ninety million, six hundred forty-five thousand, four hundred twenty-four".