11575440 has 160 divisors (see below), whose sum is σ = 41783040. Its totient is φ = 2939904.

The previous prime is 11575439. The next prime is 11575441. The reversal of 11575440 is 4457511.

It is a happy number.

11575440 is a `hidden beast` number, since 115 + 7 + 544 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (11575439) and next prime (11575441).

It is a super-2 number, since 2×11575440² = 267981622387200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11575441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49564 + ... + 49796.

It is an arithmetic number, because the mean of its divisors is an integer number (261144).

Almost surely, 2^11575440 is an apocalyptic number.

11575440 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 11575440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20891520).

11575440 is an abundant number, since it is smaller than the sum of its proper divisors (30207600).

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

11575440 is a wasteful number, since it uses less digits than its factorization.

11575440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 11575440 is about 3402.2698305690. The cubic root of 11575440 is about 226.2103661637.

The spelling of 11575440 in words is "eleven million, five hundred seventy-five thousand, four hundred forty".