988664 has 8 divisors (see below), whose sum is σ = 1853760. Its totient is φ = 494328.

The previous prime is 988661. The next prime is 988681. The reversal of 988664 is 466889.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61784 + ... + 61799.

It is an arithmetic number, because the mean of its divisors is an integer number (231720).

2⁹⁸⁸⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

988664 is a deficient number, since it is larger than the sum of its proper divisors (865096).

988664 is a wasteful number, since it uses less digits than its factorization.

988664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123589 (or 123585 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 988664 is about 994.3158451921. The cubic root of 988664 is about 99.6206964405.

The spelling of 988664 in words is "nine hundred eighty-eight thousand, six hundred sixty-four".