11289440 has 48 divisors (see below), whose sum is σ = 27406512. Its totient is φ = 4391424.

The previous prime is 11289427. The next prime is 11289451. The reversal of 11289440 is 4498211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4967 + ... + 6873.

It is an arithmetic number, because the mean of its divisors is an integer number (570969).

Almost surely, 2^11289440 is an apocalyptic number.

11289440 is a gapful number since it is divisible by the number (10) 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 11289440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13703256).

11289440 is an abundant number, since it is smaller than the sum of its proper divisors (16117072).

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

11289440 is a wasteful number, since it uses less digits than its factorization.

11289440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959 (or 1951 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 11289440 is about 3359.9761903918. The cubic root of 11289440 is about 224.3317787497.

The spelling of 11289440 in words is "eleven million, two hundred eighty-nine thousand, four hundred forty".