9398197638 has 32 divisors (see below), whose sum is σ = 20889025920. Its totient is φ = 3132111240.

The previous prime is 9398197619. The next prime is 9398197643. The reversal of 9398197638 is 8367918939.

It is a super-2 number, since 2×9398197638² (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 15 ways as a sum of consecutive naturals, for example, 316881 + ... + 345267.

It is an arithmetic number, because the mean of its divisors is an integer number (652782060).

Almost surely, 2^9398197638 is an apocalyptic number.

9398197638 is an abundant number, since it is smaller than the sum of its proper divisors (11490828282).

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

9398197638 is a wasteful number, since it uses less digits than its factorization.

9398197638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34529 (or 34523 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The square root of 9398197638 is about 96944.3017304266. The cubic root of 9398197638 is about 2110.3193992503.

The spelling of 9398197638 in words is "nine billion, three hundred ninety-eight million, one hundred ninety-seven thousand, six hundred thirty-eight".