11405040 has 40 divisors (see below), whose sum is σ = 35356368. Its totient is φ = 3041280.

The previous prime is 11405029. The next prime is 11405041. The reversal of 11405040 is 4050411.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11405041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23521 + ... + 24000.

Almost surely, 2^11405040 is an apocalyptic number.

11405040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11405040 is an abundant number, since it is smaller than the sum of its proper divisors (23951328).

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

11405040 is a wasteful number, since it uses less digits than its factorization.

11405040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47537 (or 47531 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 11405040 is about 3377.1348803387. The cubic root of 11405040 is about 225.0948735702.

Adding to 11405040 its reverse (4050411), we get a palindrome (15455451).

It can be divided in two parts, 1 and 1405040, that added together give a palindrome (1405041).

The spelling of 11405040 in words is "eleven million, four hundred five thousand, forty".