11129920 has 28 divisors (see below), whose sum is σ = 26503884. Its totient is φ = 4451840.

The previous prime is 11129903. The next prime is 11129927. The reversal of 11129920 is 2992111.

It can be written as a sum of positive squares in 2 ways, for example, as 3904576 + 7225344 = 1976^2 + 2688^2 .

It is not an unprimeable number, because it can be changed into a prime (11129927) 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, 17071 + ... + 17710.

Almost surely, 2^11129920 is an apocalyptic number.

11129920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11129920 is an abundant number, since it is smaller than the sum of its proper divisors (15373964).

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

11129920 is an equidigital number, since it uses as much as digits as its factorization.

11129920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34798 (or 34788 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 11129920 is about 3336.1534736879. The cubic root of 11129920 is about 223.2701586121.

The spelling of 11129920 in words is "eleven million, one hundred twenty-nine thousand, nine hundred twenty".