11071998 has 64 divisors (see below), whose sum is σ = 29790720. Its totient is φ = 2975616.

The previous prime is 11071979. The next prime is 11072029. The reversal of 11071998 is 89917011.

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 31 ways as a sum of consecutive naturals, for example, 5565 + ... + 7287.

It is an arithmetic number, because the mean of its divisors is an integer number (465480).

Almost surely, 2^11071998 is an apocalyptic number.

11071998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11071998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14895360).

11071998 is an abundant number, since it is smaller than the sum of its proper divisors (18718722).

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

11071998 is a wasteful number, since it uses less digits than its factorization.

11071998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758 (or 1752 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 11071998 is about 3327.4611943643. The cubic root of 11071998 is about 222.8821728015.

The spelling of 11071998 in words is "eleven million, seventy-one thousand, nine hundred ninety-eight".