11428440 has 64 divisors (see below), whose sum is σ = 34594560. Its totient is φ = 3020160.

The previous prime is 11428433. The next prime is 11428451. The reversal of 11428440 is 4482411.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11428440.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15357 + ... + 16083.

It is an arithmetic number, because the mean of its divisors is an integer number (540540).

Almost surely, 2^11428440 is an apocalyptic number.

11428440 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 11428440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17297280).

11428440 is an abundant number, since it is smaller than the sum of its proper divisors (23166120).

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

11428440 is a wasteful number, since it uses less digits than its factorization.

11428440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 11428440 is about 3380.5975803103. The cubic root of 11428440 is about 225.2487126287.

The spelling of 11428440 in words is "eleven million, four hundred twenty-eight thousand, four hundred forty".