988658 has 8 divisors (see below), whose sum is σ = 1617840. Its totient is φ = 449380.

The previous prime is 988651. The next prime is 988661. The reversal of 988658 is 856889.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 988658.

It is not an unprimeable number, because it can be changed into a prime (988651) 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, 22448 + ... + 22491.

It is an arithmetic number, because the mean of its divisors is an integer number (202230).

2⁹⁸⁸⁶⁵⁸ is an apocalyptic number.

988658 is a deficient number, since it is larger than the sum of its proper divisors (629182).

988658 is a wasteful number, since it uses less digits than its factorization.

988658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44952.

The product of its digits is 138240, while the sum is 44.

The square root of 988658 is about 994.3128280375. The cubic root of 988658 is about 99.6204949142.

Subtracting from 988658 its reverse (856889), we obtain a square (131769 = 363²).

The spelling of 988658 in words is "nine hundred eighty-eight thousand, six hundred fifty-eight".