988656 has 40 divisors (see below), whose sum is σ = 2618880. Its totient is φ = 321216.

The previous prime is 988651. The next prime is 988661. The reversal of 988656 is 656889.

It is an interprime number because it is at equal distance from previous prime (988651) and next prime (988661).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988651) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1825 + ... + 2303.

It is an arithmetic number, because the mean of its divisors is an integer number (65472).

2⁹⁸⁸⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 988656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1309440).

988656 is an abundant number, since it is smaller than the sum of its proper divisors (1630224).

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

988656 is a wasteful number, since it uses less digits than its factorization.

988656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 527 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 988656 is about 994.3118223173. The cubic root of 988656 is about 99.6204277385.

The spelling of 988656 in words is "nine hundred eighty-eight thousand, six hundred fifty-six".