11405216 has 24 divisors (see below), whose sum is σ = 23004324. Its totient is φ = 5562880.

The previous prime is 11405201. The next prime is 11405239. The reversal of 11405216 is 61250411.

It can be written as a sum of positive squares in 2 ways, for example, as 8179600 + 3225616 = 2860^2 + 1796^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3035 + ... + 5658.

Almost surely, 2^11405216 is an apocalyptic number.

11405216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11405216 is an abundant number, since it is smaller than the sum of its proper divisors (11599108).

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

11405216 is an equidigital number, since it uses as much as digits as its factorization.

11405216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8744 (or 8736 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 11405216 is about 3377.1609378293. The cubic root of 11405216 is about 225.0960314353.

Adding to 11405216 its reverse (61250411), we get a palindrome (72655627).

The spelling of 11405216 in words is "eleven million, four hundred five thousand, two hundred sixteen".