11401440 has 48 divisors (see below), whose sum is σ = 35916048. Its totient is φ = 3040256.

The previous prime is 11401427. The next prime is 11401447. The reversal of 11401440 is 4410411.

It is a tau number, because it is divible by the number of its divisors (48).

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 (11401447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11397 + ... + 12356.

It is an arithmetic number, because the mean of its divisors is an integer number (748251).

Almost surely, 2^11401440 is an apocalyptic number.

11401440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11401440 is an abundant number, since it is smaller than the sum of its proper divisors (24514608).

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

11401440 is a wasteful number, since it uses less digits than its factorization.

11401440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23771 (or 23763 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 11401440 is about 3376.6018420892. The cubic root of 11401440 is about 225.0711873513.

Adding to 11401440 its reverse (4410411), we get a palindrome (15811851).

The spelling of 11401440 in words is "eleven million, four hundred one thousand, four hundred forty".