11278655 has 4 divisors (see below), whose sum is σ = 13534392. Its totient is φ = 9022920.

The previous prime is 11278639. The next prime is 11278681. The reversal of 11278655 is 55687211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55687211 = 89 ⋅625699.

It is not a de Polignac number, because 11278655 - 2⁴ = 11278639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127861 + ... + 1127870.

It is an arithmetic number, because the mean of its divisors is an integer number (3383598).

Almost surely, 2^11278655 is an apocalyptic number.

11278655 is a deficient number, since it is larger than the sum of its proper divisors (2255737).

11278655 is an equidigital number, since it uses as much as digits as its factorization.

11278655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255736.

The product of its digits is 16800, while the sum is 35.

The square root of 11278655 is about 3358.3708848190. The cubic root of 11278655 is about 224.2603199623.

The spelling of 11278655 in words is "eleven million, two hundred seventy-eight thousand, six hundred fifty-five".