11281989 has 8 divisors (see below), whose sum is σ = 15062080. Its totient is φ = 7511616.

The previous prime is 11281987. The next prime is 11281997. The reversal of 11281989 is 98918211.

11281989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11281989 - 2¹ = 11281987 is a prime.

It is a super-2 number, since 2×11281989² = 254566551592242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11281987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957 + ... + 4845.

It is an arithmetic number, because the mean of its divisors is an integer number (1882760).

Almost surely, 2^11281989 is an apocalyptic number.

It is an amenable number.

11281989 is a deficient number, since it is larger than the sum of its proper divisors (3780091).

11281989 is an equidigital number, since it uses as much as digits as its factorization.

11281989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859.

The product of its digits is 10368, while the sum is 39.

The square root of 11281989 is about 3358.8672197632. The cubic root of 11281989 is about 224.2824150982.

The spelling of 11281989 in words is "eleven million, two hundred eighty-one thousand, nine hundred eighty-nine".