11447280 has 120 divisors (see below), whose sum is σ = 41434848. Its totient is φ = 2815488.

The previous prime is 11447279. The next prime is 11447281. The reversal of 11447280 is 8274411.

11447280 is a `hidden beast` number, since 114 + 472 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (11447279) and next prime (11447281).

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11447281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8749 + ... + 9971.

Almost surely, 2^11447280 is an apocalyptic number.

11447280 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 11447280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20717424).

11447280 is an abundant number, since it is smaller than the sum of its proper divisors (29987568).

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

11447280 is a wasteful number, since it uses less digits than its factorization.

11447280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 11447280 is about 3383.3829224609. The cubic root of 11447280 is about 225.3724202665.

The spelling of 11447280 in words is "eleven million, four hundred forty-seven thousand, two hundred eighty".