1098864 has 60 divisors (see below), whose sum is σ = 3317496. Its totient is φ = 337536.

The previous prime is 1098847. The next prime is 1098953. The reversal of 1098864 is 4688901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 12.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1579 + ... + 2165.

2^1098864 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 1098864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658748).

1098864 is an abundant number, since it is smaller than the sum of its proper divisors (2218632).

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

1098864 is a wasteful number, since it uses less digits than its factorization.

1098864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1098864 is about 1048.2671415245. The cubic root of 1098864 is about 103.1924638449.

The spelling of 1098864 in words is "one million, ninety-eight thousand, eight hundred sixty-four".