11031240 has 128 divisors (see below), whose sum is σ = 36961920. Its totient is φ = 2611200.

The previous prime is 11031239. The next prime is 11031247. The reversal of 11031240 is 4213011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (11031247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80452 + ... + 80588.

It is an arithmetic number, because the mean of its divisors is an integer number (288765).

Almost surely, 2^11031240 is an apocalyptic number.

11031240 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 11031240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18480960).

11031240 is an abundant number, since it is smaller than the sum of its proper divisors (25930680).

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

11031240 is a wasteful number, since it uses less digits than its factorization.

11031240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 11031240 is about 3321.3310584764. The cubic root of 11031240 is about 222.6083468446.

Adding to 11031240 its reverse (4213011), we get a palindrome (15244251).

The spelling of 11031240 in words is "eleven million, thirty-one thousand, two hundred forty".