996556 has 36 divisors (see below), whose sum is σ = 2010960. Its totient is φ = 431200.

The previous prime is 996551. The next prime is 996563. The reversal of 996556 is 655699.

996556 = T₆₃ + T₆₄ + ... + T₁₈₃.

It is a super-2 number, since 2×996556² = 1986247722272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996551) 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 11 ways as a sum of consecutive naturals, for example, 14001 + ... + 14071.

It is an arithmetic number, because the mean of its divisors is an integer number (55860).

2⁹⁹⁶⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

996556 is an abundant number, since it is smaller than the sum of its proper divisors (1014404).

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

996556 is a wasteful number, since it uses less digits than its factorization.

996556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 113 counting only the distinct ones).

The product of its digits is 72900, while the sum is 40.

The square root of 996556 is about 998.2765147994. The cubic root of 996556 is about 99.8850679569.

The spelling of 996556 in words is "nine hundred ninety-six thousand, five hundred fifty-six".