11389840 has 120 divisors (see below), whose sum is σ = 33801408. Its totient is φ = 3467520.

The previous prime is 11389831. The next prime is 11389849. The reversal of 11389840 is 4898311.

It is a happy number.

11389840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11389831) and next prime (11389849).

It is a junction number, because it is equal to n+sod(n) for n = 11389796 and 11389805.

It is not an unprimeable number, because it can be changed into a prime (11389849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264859 + ... + 264901.

Almost surely, 2^11389840 is an apocalyptic number.

11389840 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 11389840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16900704).

11389840 is an abundant number, since it is smaller than the sum of its proper divisors (22411568).

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

11389840 is a wasteful number, since it uses less digits than its factorization.

11389840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 11389840 is about 3374.8837017000. The cubic root of 11389840 is about 224.9948311570.

The spelling of 11389840 in words is "eleven million, three hundred eighty-nine thousand, eight hundred forty".