9998378 has 12 divisors (see below), whose sum is σ = 16240518. Its totient is φ = 4614480.

The previous prime is 9998377. The next prime is 9998381. The reversal of 9998378 is 8738999.

It can be written as a sum of positive squares in 3 ways, for example, as 6285049 + 3713329 = 2507^2 + 1927^2 .

It is not an unprimeable number, because it can be changed into a prime (9998377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14453 + ... + 15128.

Almost surely, 2^9998378 is an apocalyptic number.

9998378 is a deficient number, since it is larger than the sum of its proper divisors (6242140).

9998378 is a wasteful number, since it uses less digits than its factorization.

9998378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29609 (or 29596 counting only the distinct ones).

The product of its digits is 979776, while the sum is 53.

The square root of 9998378 is about 3162.0211890498. The cubic root of 9998378 is about 215.4318200631.

The spelling of 9998378 in words is "nine million, nine hundred ninety-eight thousand, three hundred seventy-eight".