11280555 has 48 divisors (see below), whose sum is σ = 22984416. Its totient is φ = 5045760.

The previous prime is 11280527. The next prime is 11280569. The reversal of 11280555 is 55508211.

It is not a de Polignac number, because 11280555 - 2⁷ = 11280427 is a prime.

It is a super-2 number, since 2×11280555² = 254501842216050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5559 + ... + 7311.

It is an arithmetic number, because the mean of its divisors is an integer number (478842).

Almost surely, 2^11280555 is an apocalyptic number.

11280555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11280555 is an abundant number, since it is smaller than the sum of its proper divisors (11703861).

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

11280555 is a wasteful number, since it uses less digits than its factorization.

11280555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788 (or 1785 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 11280555 is about 3358.6537481557. The cubic root of 11280555 is about 224.2729122050.

Adding to 11280555 its reverse (55508211), we get a palindrome (66788766).

The spelling of 11280555 in words is "eleven million, two hundred eighty thousand, five hundred fifty-five".