986638 has 8 divisors (see below), whose sum is σ = 1531080. Its totient is φ = 476280.

The previous prime is 986633. The next prime is 986641. The reversal of 986638 is 836689.

986638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 986638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8448 + ... + 8563.

It is an arithmetic number, because the mean of its divisors is an integer number (191385).

2⁹⁸⁶⁶³⁸ is an apocalyptic number.

986638 is a deficient number, since it is larger than the sum of its proper divisors (544442).

986638 is a wasteful number, since it uses less digits than its factorization.

986638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17042.

The product of its digits is 62208, while the sum is 40.

The square root of 986638 is about 993.2965317568. The cubic root of 986638 is about 99.5526013294.

The spelling of 986638 in words is "nine hundred eighty-six thousand, six hundred thirty-eight".