1099830 has 32 divisors (see below), whose sum is σ = 2687328. Its totient is φ = 288000.

The previous prime is 1099823. The next prime is 1099841. The reversal of 1099830 is 389901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1530 + ... + 2130.

It is an arithmetic number, because the mean of its divisors is an integer number (83979).

2^1099830 is an apocalyptic number.

1099830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1099830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343664).

1099830 is an abundant number, since it is smaller than the sum of its proper divisors (1587498).

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

1099830 is a wasteful number, since it uses less digits than its factorization.

1099830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1099830 is about 1048.7278007186. The cubic root of 1099830 is about 103.2226934650. Note that the first 3 decimals are identical.

The spelling of 1099830 in words is "one million, ninety-nine thousand, eight hundred thirty".