11861280 has 72 divisors (see below), whose sum is σ = 40481532. Its totient is φ = 3162624.

The previous prime is 11861273. The next prime is 11861293. The reversal of 11861280 is 8216811.

11861280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11861136 + 144 = 3444^2 + 12^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2679 + ... + 5558.

Almost surely, 2^11861280 is an apocalyptic number.

11861280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11861280 is an abundant number, since it is smaller than the sum of its proper divisors (28620252).

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

11861280 is a wasteful number, since it uses less digits than its factorization.

11861280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8258 (or 8247 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 11861280 is about 3444.0209058599. The cubic root of 11861280 is about 228.0572340157.

The spelling of 11861280 in words is "eleven million, eight hundred sixty-one thousand, two hundred eighty".