11712280 has 16 divisors (see below), whose sum is σ = 26352720. Its totient is φ = 4684896.

The previous prime is 11712277. The next prime is 11712287. The reversal of 11712280 is 8221711.

11712280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11712287) 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, 146364 + ... + 146443.

It is an arithmetic number, because the mean of its divisors is an integer number (1647045).

Almost surely, 2^11712280 is an apocalyptic number.

11712280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11712280 is an abundant number, since it is smaller than the sum of its proper divisors (14640440).

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

11712280 is a wasteful number, since it uses less digits than its factorization.

11712280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292818 (or 292814 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 11712280 is about 3422.3208499496. The cubic root of 11712280 is about 227.0982645589.

Adding to 11712280 its reverse (8221711), we get a palindrome (19933991).

The spelling of 11712280 in words is "eleven million, seven hundred twelve thousand, two hundred eighty".