11278720 has 32 divisors (see below), whose sum is σ = 26964720. Its totient is φ = 4511232.

The previous prime is 11278711. The next prime is 11278721. The reversal of 11278720 is 2787211.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11278721) 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, 8172 + ... + 9451.

Almost surely, 2^11278720 is an apocalyptic number.

11278720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11278720 is an abundant number, since it is smaller than the sum of its proper divisors (15686000).

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

11278720 is an equidigital number, since it uses as much as digits as its factorization.

11278720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17642 (or 17630 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 11278720 is about 3358.3805621162. The cubic root of 11278720 is about 224.2607507729.

It can be divided in two parts, 1 and 1278720, that added together give a palindrome (1278721).

The spelling of 11278720 in words is "eleven million, two hundred seventy-eight thousand, seven hundred twenty".