998992656 has 80 divisors (see below), whose sum is σ = 2871899520. Its totient is φ = 332484480.

The previous prime is 998992651. The next prime is 998992691. The reversal of 998992656 is 656299899.

998992656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 998992593 and 998992602.

It is not an unprimeable number, because it can be changed into a prime (998992651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367141 + ... + 369851.

It is an arithmetic number, because the mean of its divisors is an integer number (35898744).

Almost surely, 2^998992656 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 998992656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1435949760).

998992656 is an abundant number, since it is smaller than the sum of its proper divisors (1872906864).

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

998992656 is a wasteful number, since it uses less digits than its factorization.

998992656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581 (or 3569 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 63.

The square root of 998992656 is about 31606.8450814060. The cubic root of 998992656 is about 999.6641058544.

The spelling of 998992656 in words is "nine hundred ninety-eight million, nine hundred ninety-two thousand, six hundred fifty-six".