11911028 has 12 divisors (see below), whose sum is σ = 20920452. Its totient is φ = 5933760.

The previous prime is 11911027. The next prime is 11911057. The reversal of 11911028 is 82011911.

It can be written as a sum of positive squares in 2 ways, for example, as 3489424 + 8421604 = 1868^2 + 2902^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11910994 and 11911012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11911027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4175 + ... + 6422.

It is an arithmetic number, because the mean of its divisors is an integer number (1743371).

Almost surely, 2^11911028 is an apocalyptic number.

It is an amenable number.

11911028 is a deficient number, since it is larger than the sum of its proper divisors (9009424).

11911028 is a wasteful number, since it uses less digits than its factorization.

11911028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10882 (or 10880 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 11911028 is about 3451.2357207238. The cubic root of 11911028 is about 228.3756247994.

Adding to 11911028 its reverse (82011911), we get a palindrome (93922939).

The spelling of 11911028 in words is "eleven million, nine hundred eleven thousand, twenty-eight".