988642 has 8 divisors (see below), whose sum is σ = 1487196. Its totient is φ = 492912.

The previous prime is 988607. The next prime is 988643. The reversal of 988642 is 246889.

It can be written as a sum of positive squares in 2 ways, for example, as 982081 + 6561 = 991^2 + 81^2 .

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

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (988643) by changing a digit.

988642 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 in 3 ways as a sum of consecutive naturals, for example, 928 + ... + 1684.

2⁹⁸⁸⁶⁴² is an apocalyptic number.

988642 is a deficient number, since it is larger than the sum of its proper divisors (498554).

988642 is a wasteful number, since it uses less digits than its factorization.

988642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412.

The product of its digits is 27648, while the sum is 37.

The square root of 988642 is about 994.3047822474. The cubic root of 988642 is about 99.6199575067.

The spelling of 988642 in words is "nine hundred eighty-eight thousand, six hundred forty-two".