11239840 has 24 divisors (see below), whose sum is σ = 26554500. Its totient is φ = 4495872.

The previous prime is 11239807. The next prime is 11239841. The reversal of 11239840 is 4893211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9809424 + 1430416 = 3132^2 + 1196^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11239799 and 11239808.

It is not an unprimeable number, because it can be changed into a prime (11239841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34965 + ... + 35284.

Almost surely, 2^11239840 is an apocalyptic number.

11239840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11239840 is an abundant number, since it is smaller than the sum of its proper divisors (15314660).

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

11239840 is an equidigital number, since it uses as much as digits as its factorization.

11239840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70264 (or 70256 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 11239840 is about 3352.5870607637. The cubic root of 11239840 is about 224.0027635713.

The spelling of 11239840 in words is "eleven million, two hundred thirty-nine thousand, eight hundred forty".