11281788 has 48 divisors (see below), whose sum is σ = 33429760. Its totient is φ = 3223152.

The previous prime is 11281769. The next prime is 11281789. The reversal of 11281788 is 88718211.

11281788 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11281789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6706 + ... + 8217.

Almost surely, 2^11281788 is an apocalyptic number.

11281788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11281788 is an abundant number, since it is smaller than the sum of its proper divisors (22147972).

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

11281788 is a wasteful number, since it uses less digits than its factorization.

11281788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14943 (or 14935 counting only the distinct ones).

The product of its digits is 7168, while the sum is 36.

The square root of 11281788 is about 3358.8372988283. The cubic root of 11281788 is about 224.2810831513.

Adding to 11281788 its reverse (88718211), we get a palindrome (99999999).

It can be divided in two parts, 1128 and 1788, that added together give a square (2916 = 54²).

The spelling of 11281788 in words is "eleven million, two hundred eighty-one thousand, seven hundred eighty-eight".