11278385 has 4 divisors (see below), whose sum is σ = 13534068. Its totient is φ = 9022704.

The previous prime is 11278357. The next prime is 11278391. The reversal of 11278385 is 58387211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58387211 = 2141 ⋅27271.

It can be written as a sum of positive squares in 2 ways, for example, as 1343281 + 9935104 = 1159^2 + 3152^2 .

It is a cyclic number.

It is not a de Polignac number, because 11278385 - 2¹⁶ = 11212849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127834 + ... + 1127843.

It is an arithmetic number, because the mean of its divisors is an integer number (3383517).

Almost surely, 2^11278385 is an apocalyptic number.

It is an amenable number.

11278385 is a deficient number, since it is larger than the sum of its proper divisors (2255683).

11278385 is an equidigital number, since it uses as much as digits as its factorization.

11278385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255682.

The product of its digits is 13440, while the sum is 35.

The square root of 11278385 is about 3358.3306865167. The cubic root of 11278385 is about 224.2585304236.

The spelling of 11278385 in words is "eleven million, two hundred seventy-eight thousand, three hundred eighty-five".