11129240 has 32 divisors (see below), whose sum is σ = 26131680. Its totient is φ = 4257792.

The previous prime is 11129233. The next prime is 11129249. The reversal of 11129240 is 4292111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11129249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129 + ... + 6968.

It is an arithmetic number, because the mean of its divisors is an integer number (816615).

Almost surely, 2^11129240 is an apocalyptic number.

11129240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11129240 is an abundant number, since it is smaller than the sum of its proper divisors (15002440).

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

11129240 is a wasteful number, since it uses less digits than its factorization.

11129240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12131 (or 12127 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 11129240 is about 3336.0515583546. The cubic root of 11129240 is about 223.2656115055.

The spelling of 11129240 in words is "eleven million, one hundred twenty-nine thousand, two hundred forty".