11320428 has 96 divisors (see below), whose sum is σ = 32739840. Its totient is φ = 2972160.

The previous prime is 11320427. The next prime is 11320433. The reversal of 11320428 is 82402311.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11320423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65350 + ... + 65522.

It is an arithmetic number, because the mean of its divisors is an integer number (341040).

Almost surely, 2^11320428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11320428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16369920).

11320428 is an abundant number, since it is smaller than the sum of its proper divisors (21419412).

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

11320428 is a wasteful number, since it uses less digits than its factorization.

11320428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 11320428 is about 3364.5843725489. The cubic root of 11320428 is about 224.5368447951.

Adding to 11320428 its reverse (82402311), we get a palindrome (93722739).

The spelling of 11320428 in words is "eleven million, three hundred twenty thousand, four hundred twenty-eight".