998768438 has 16 divisors (see below), whose sum is σ = 1511225856. Its totient is φ = 495045120.

The previous prime is 998768429. The next prime is 998768483. The reversal of 998768438 is 834867899.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108683 + ... + 117513.

It is an arithmetic number, because the mean of its divisors is an integer number (94451616).

Almost surely, 2^998768438 is an apocalyptic number.

998768438 is a deficient number, since it is larger than the sum of its proper divisors (512457418).

998768438 is a wasteful number, since it uses less digits than its factorization.

998768438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9319.

The product of its digits is 20901888, while the sum is 62.

The square root of 998768438 is about 31603.2978975296. The cubic root of 998768438 is about 999.5893106907.

The spelling of 998768438 in words is "nine hundred ninety-eight million, seven hundred sixty-eight thousand, four hundred thirty-eight".