11581284 has 96 divisors (see below), whose sum is σ = 33699456. Its totient is φ = 3041280.

The previous prime is 11581261. The next prime is 11581331. The reversal of 11581284 is 48218511.

It is a happy number.

11581284 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11581284² = 268252278177312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28974 + ... + 29370.

It is an arithmetic number, because the mean of its divisors is an integer number (351036).

Almost surely, 2^11581284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11581284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16849728).

11581284 is an abundant number, since it is smaller than the sum of its proper divisors (22118172).

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

11581284 is a wasteful number, since it uses less digits than its factorization.

11581284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 443 counting only the distinct ones).

The product of its digits is 2560, while the sum is 30.

The square root of 11581284 is about 3403.1285606042. The cubic root of 11581284 is about 226.2484280997.

Adding to 11581284 its reverse (48218511), we get a palindrome (59799795).

It can be divided in two parts, 1158 and 1284, that added together give a palindrome (2442).

The spelling of 11581284 in words is "eleven million, five hundred eighty-one thousand, two hundred eighty-four".