1098656 has 48 divisors (see below), whose sum is σ = 2469600. Its totient is φ = 476928.

The previous prime is 1098649. The next prime is 1098667. The reversal of 1098656 is 6568901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7835 + ... + 7973.

It is an arithmetic number, because the mean of its divisors is an integer number (51450).

2^1098656 is an apocalyptic number.

1098656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234800).

1098656 is an abundant number, since it is smaller than the sum of its proper divisors (1370944).

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

1098656 is a wasteful number, since it uses less digits than its factorization.

1098656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1098656 is about 1048.1679254776. The cubic root of 1098656 is about 103.1859524577.

The spelling of 1098656 in words is "one million, ninety-eight thousand, six hundred fifty-six".