984638 has 4 divisors (see below), whose sum is σ = 1476960. Its totient is φ = 492318.

The previous prime is 984617. The next prime is 984667. The reversal of 984638 is 836489.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836489 = 503 ⋅1663.

It is a Curzon number.

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 984638.

It is an unprimeable number.

984638 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246158 + ... + 246161.

It is an arithmetic number, because the mean of its divisors is an integer number (369240).

2⁹⁸⁴⁶³⁸ is an apocalyptic number.

984638 is a deficient number, since it is larger than the sum of its proper divisors (492322).

984638 is a wasteful number, since it uses less digits than its factorization.

984638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492321.

The product of its digits is 41472, while the sum is 38.

The square root of 984638 is about 992.2892723395. The cubic root of 984638 is about 99.4852886005.

The spelling of 984638 in words is "nine hundred eighty-four thousand, six hundred thirty-eight".