9778398 has 16 divisors (see below), whose sum is σ = 22350720. Its totient is φ = 2793816.

The previous prime is 9778387. The next prime is 9778403. The reversal of 9778398 is 8938779.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9778398.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116368 + ... + 116451.

It is an arithmetic number, because the mean of its divisors is an integer number (1396920).

Almost surely, 2^9778398 is an apocalyptic number.

9778398 is an abundant number, since it is smaller than the sum of its proper divisors (12572322).

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

9778398 is a wasteful number, since it uses less digits than its factorization.

9778398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232831.

The product of its digits is 762048, while the sum is 51.

The square root of 9778398 is about 3127.0430121762. The cubic root of 9778398 is about 213.8401432316.

The spelling of 9778398 in words is "nine million, seven hundred seventy-eight thousand, three hundred ninety-eight".