11543280 has 80 divisors (see below), whose sum is σ = 40902144. Its totient is φ = 2638080.

The previous prime is 11543269. The next prime is 11543293. The reversal of 11543280 is 8234511.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×11543280³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11543280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1756 + ... + 5115.

Almost surely, 2^11543280 is an apocalyptic number.

11543280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11543280 is an abundant number, since it is smaller than the sum of its proper divisors (29358864).

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

11543280 is a wasteful number, since it uses less digits than its factorization.

11543280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6894 (or 6888 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 11543280 is about 3397.5402867369. The cubic root of 11543280 is about 226.0006787251. Note that the first 3 decimals are identical.

Adding to 11543280 its reverse (8234511), we get a palindrome (19777791).

The spelling of 11543280 in words is "eleven million, five hundred forty-three thousand, two hundred eighty".