1100988 has 72 divisors (see below), whose sum is σ = 3380832. Its totient is φ = 294912.

The previous prime is 1100977. The next prime is 1101071. The reversal of 1100988 is 8890011.

It is a super-2 number, since 2×1100988² = 2424349152288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4156 + ... + 4412.

It is an arithmetic number, because the mean of its divisors is an integer number (46956).

2^1100988 is an apocalyptic number.

1100988 is a gapful number since it is divisible by the number (18) 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 1100988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1690416).

1100988 is an abundant number, since it is smaller than the sum of its proper divisors (2279844).

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

1100988 is a wasteful number, since it uses less digits than its factorization.

1100988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1100988 is about 1049.2797529734. The cubic root of 1100988 is about 103.2589081383.

Adding to 1100988 its reverse (8890011), we get a palindrome (9990999).

The spelling of 1100988 in words is "one million, one hundred thousand, nine hundred eighty-eight".