11122840 has 16 divisors (see below), whose sum is σ = 25026480. Its totient is φ = 4449120.

The previous prime is 11122819. The next prime is 11122861. The reversal of 11122840 is 4822111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11122819) and next prime (11122861).

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 3 ways as a sum of consecutive naturals, for example, 138996 + ... + 139075.

It is an arithmetic number, because the mean of its divisors is an integer number (1564155).

Almost surely, 2^11122840 is an apocalyptic number.

11122840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11122840 is an abundant number, since it is smaller than the sum of its proper divisors (13903640).

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

11122840 is a wasteful number, since it uses less digits than its factorization.

11122840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278082 (or 278078 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 11122840 is about 3335.0922026235. The cubic root of 11122840 is about 223.2228061296. Note that the first 3 decimals are identical.

Adding to 11122840 its reverse (4822111), we get a palindrome (15944951).

The spelling of 11122840 in words is "eleven million, one hundred twenty-two thousand, eight hundred forty".