11281328 has 20 divisors (see below), whose sum is σ = 21914520. Its totient is φ = 5625984.

The previous prime is 11281321. The next prime is 11281343. The reversal of 11281328 is 82318211.

It is a super-2 number, since 2×11281328² = 254536722887168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11281297 and 11281306.

It is not an unprimeable number, because it can be changed into a prime (11281321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8108 + ... + 9396.

It is an arithmetic number, because the mean of its divisors is an integer number (1095726).

Almost surely, 2^11281328 is an apocalyptic number.

It is an amenable number.

11281328 is a deficient number, since it is larger than the sum of its proper divisors (10633192).

11281328 is a wasteful number, since it uses less digits than its factorization.

11281328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844 (or 1838 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 11281328 is about 3358.7688220537. The cubic root of 11281328 is about 224.2780348549.

Adding to 11281328 its reverse (82318211), we get a palindrome (93599539).

The spelling of 11281328 in words is "eleven million, two hundred eighty-one thousand, three hundred twenty-eight".