11278389 has 16 divisors (see below), whose sum is σ = 15634944. Its totient is φ = 7224000.

The previous prime is 11278357. The next prime is 11278391. The reversal of 11278389 is 98387211.

11278389 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 11278389 - 2⁵ = 11278357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11278789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15739 + ... + 16439.

It is an arithmetic number, because the mean of its divisors is an integer number (977184).

Almost surely, 2^11278389 is an apocalyptic number.

It is an amenable number.

11278389 is a deficient number, since it is larger than the sum of its proper divisors (4356555).

11278389 is a wasteful number, since it uses less digits than its factorization.

11278389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908.

The product of its digits is 24192, while the sum is 39.

The square root of 11278389 is about 3358.3312820507. The cubic root of 11278389 is about 224.2585569355.

The spelling of 11278389 in words is "eleven million, two hundred seventy-eight thousand, three hundred eighty-nine".