9798397428 has 24 divisors (see below), whose sum is σ = 22937408032. Its totient is φ = 3255492384.

The previous prime is 9798397421. The next prime is 9798397501. The reversal of 9798397428 is 8247938979.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9798397421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1326175 + ... + 1333542.

Almost surely, 2^9798397428 is an apocalyptic number.

It is an amenable number.

9798397428 is an abundant number, since it is smaller than the sum of its proper divisors (13139010604).

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

9798397428 is a wasteful number, since it uses less digits than its factorization.

9798397428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660031 (or 2660029 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 66.

The square root of 9798397428 is about 98986.8548242644. The cubic root of 9798397428 is about 2139.8583063374.

The spelling of 9798397428 in words is "nine billion, seven hundred ninety-eight million, three hundred ninety-seven thousand, four hundred twenty-eight".