998378 has 4 divisors (see below), whose sum is σ = 1497570. Its totient is φ = 499188.

The previous prime is 998377. The next prime is 998381. The reversal of 998378 is 873899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 877969 + 120409 = 937^2 + 347^2 .

It is not an unprimeable number, because it can be changed into a prime (998377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249593 + ... + 249596.

2⁹⁹⁸³⁷⁸ is an apocalyptic number.

998378 is a deficient number, since it is larger than the sum of its proper divisors (499192).

998378 is a wasteful number, since it uses less digits than its factorization.

998378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499191.

The product of its digits is 108864, while the sum is 44.

The square root of 998378 is about 999.1886708725. The cubic root of 998378 is about 99.9459040749.

The spelling of 998378 in words is "nine hundred ninety-eight thousand, three hundred seventy-eight".