11031920 has 40 divisors (see below), whose sum is σ = 26349504. Its totient is φ = 4292352.

The previous prime is 11031893. The next prime is 11031931. The reversal of 11031920 is 2913011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097 + ... + 4823.

Almost surely, 2^11031920 is an apocalyptic number.

11031920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11031920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13174752).

11031920 is an abundant number, since it is smaller than the sum of its proper divisors (15317584).

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

11031920 is a wasteful number, since it uses less digits than its factorization.

11031920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777 (or 3771 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 11031920 is about 3321.4334254957. The cubic root of 11031920 is about 222.6129208412.

Adding to 11031920 its reverse (2913011), we get a palindrome (13944931).

The spelling of 11031920 in words is "eleven million, thirty-one thousand, nine hundred twenty".