11405340 has 48 divisors (see below), whose sum is σ = 35484960. Its totient is φ = 3041280.

The previous prime is 11405327. The next prime is 11405341. The reversal of 11405340 is 4350411.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11405341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10021 + ... + 11100.

It is an arithmetic number, because the mean of its divisors is an integer number (739270).

Almost surely, 2^11405340 is an apocalyptic number.

11405340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11405340 is an abundant number, since it is smaller than the sum of its proper divisors (24079620).

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

11405340 is a wasteful number, since it uses less digits than its factorization.

11405340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21139 (or 21131 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 11405340 is about 3377.1792963951. The cubic root of 11405340 is about 225.0968471968.

Adding to 11405340 its reverse (4350411), we get a palindrome (15755751).

The spelling of 11405340 in words is "eleven million, four hundred five thousand, three hundred forty".