996558 has 24 divisors (see below), whose sum is σ = 2077992. Its totient is φ = 318384.

The previous prime is 996551. The next prime is 996563. The reversal of 996558 is 855699.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 996558.

It is not an unprimeable number, because it can be changed into a prime (996551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14841 + ... + 14907.

It is an arithmetic number, because the mean of its divisors is an integer number (86583).

2⁹⁹⁶⁵⁵⁸ is an apocalyptic number.

996558 is an abundant number, since it is smaller than the sum of its proper divisors (1081434).

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

996558 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (996557) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (109).

996558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 109 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 996558 is about 998.2775165253. The cubic root of 996558 is about 99.8851347770.

The spelling of 996558 in words is "nine hundred ninety-six thousand, five hundred fifty-eight".