11042840 has 32 divisors (see below), whose sum is σ = 24948000. Its totient is φ = 4399104.

The previous prime is 11042831. The next prime is 11042849. The reversal of 11042840 is 4824011.

It is an interprime number because it is at equal distance from previous prime (11042831) and next prime (11042849).

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 (11042849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13976 + ... + 14744.

It is an arithmetic number, because the mean of its divisors is an integer number (779625).

Almost surely, 2^11042840 is an apocalyptic number.

11042840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11042840 is an abundant number, since it is smaller than the sum of its proper divisors (13905160).

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

11042840 is a wasteful number, since it uses less digits than its factorization.

11042840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 11042840 is about 3323.0768874644. The cubic root of 11042840 is about 222.6863481155.

Adding to 11042840 its reverse (4824011), we get a palindrome (15866851).

The spelling of 11042840 in words is "eleven million, forty-two thousand, eight hundred forty".