11581488 has 160 divisors (see below), whose sum is σ = 37497600. Its totient is φ = 3400704.

The previous prime is 11581487. The next prime is 11581501. The reversal of 11581488 is 88418511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11581487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139495 + ... + 139577.

It is an arithmetic number, because the mean of its divisors is an integer number (234360).

Almost surely, 2^11581488 is an apocalyptic number.

11581488 is a gapful number since it is divisible by the number (18) 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 11581488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18748800).

11581488 is an abundant number, since it is smaller than the sum of its proper divisors (25916112).

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

11581488 is a wasteful number, since it uses less digits than its factorization.

11581488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 124 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 11581488 is about 3403.1585328926. The cubic root of 11581488 is about 226.2497565192.

Adding to 11581488 its reverse (88418511), we get a palindrome (99999999).

The spelling of 11581488 in words is "eleven million, five hundred eighty-one thousand, four hundred eighty-eight".