985638 has 16 divisors (see below), whose sum is σ = 2004336. Its totient is φ = 323040.

The previous prime is 985631. The next prime is 985639. The reversal of 985638 is 836589.

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

It is a junction number, because it is equal to n+sod(n) for n = 985596 and 985605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981 + ... + 1712.

It is an arithmetic number, because the mean of its divisors is an integer number (125271).

2⁹⁸⁵⁶³⁸ is an apocalyptic number.

985638 is an abundant number, since it is smaller than the sum of its proper divisors (1018698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

985638 is a wasteful number, since it uses less digits than its factorization.

985638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759.

The product of its digits is 51840, while the sum is 39.

The square root of 985638 is about 992.7930297902. The cubic root of 985638 is about 99.5189563472.

The spelling of 985638 in words is "nine hundred eighty-five thousand, six hundred thirty-eight".