989438 has 4 divisors (see below), whose sum is σ = 1484160. Its totient is φ = 494718.

The previous prime is 989423. The next prime is 989441. The reversal of 989438 is 834989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834989 = 17 ⋅49117.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 989395 and 989404.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989438.

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 as a sum of consecutive naturals, namely, 247358 + ... + 247361.

It is an arithmetic number, because the mean of its divisors is an integer number (371040).

2⁹⁸⁹⁴³⁸ is an apocalyptic number.

989438 is a deficient number, since it is larger than the sum of its proper divisors (494722).

989438 is a wasteful number, since it uses less digits than its factorization.

989438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494721.

The product of its digits is 62208, while the sum is 41.

The square root of 989438 is about 994.7049813890. The cubic root of 989438 is about 99.6466864992.

Subtracting from 989438 its reverse (834989), we obtain a square (154449 = 393²).

The spelling of 989438 in words is "nine hundred eighty-nine thousand, four hundred thirty-eight".