11561328 has 30 divisors (see below), whose sum is σ = 32356064. Its totient is φ = 3853728.

The previous prime is 11561321. The next prime is 11561359. The reversal of 11561328 is 82316511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40000 + ... + 40287.

Almost surely, 2^11561328 is an apocalyptic number.

11561328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11561328 is an abundant number, since it is smaller than the sum of its proper divisors (20794736).

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

11561328 is a wasteful number, since it uses less digits than its factorization.

11561328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80301 (or 80292 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 11561328 is about 3400.1952885092. The cubic root of 11561328 is about 226.1184019464.

Adding to 11561328 its reverse (82316511), we get a palindrome (93877839).

The spelling of 11561328 in words is "eleven million, five hundred sixty-one thousand, three hundred twenty-eight".