11581408 has 12 divisors (see below), whose sum is σ = 22800960. Its totient is φ = 5790688.

The previous prime is 11581379. The next prime is 11581417. The reversal of 11581408 is 80418511.

11581408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11581408² = 268258022524928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180928 + ... + 180991.

It is an arithmetic number, because the mean of its divisors is an integer number (1900080).

Almost surely, 2^11581408 is an apocalyptic number.

It is an amenable number.

11581408 is a deficient number, since it is larger than the sum of its proper divisors (11219552).

11581408 is an equidigital number, since it uses as much as digits as its factorization.

11581408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361929 (or 361921 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 11581408 is about 3403.1467790855. The cubic root of 11581408 is about 226.2492355722.

Adding to 11581408 its reverse (80418511), we get a palindrome (91999919).

The spelling of 11581408 in words is "eleven million, five hundred eighty-one thousand, four hundred eight".