11861428 has 6 divisors (see below), whose sum is σ = 20757506. Its totient is φ = 5930712.

The previous prime is 11861413. The next prime is 11861429. The reversal of 11861428 is 82416811.

It can be written as a sum of positive squares in only one way, i.e., 7772944 + 4088484 = 2788^2 + 2022^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11861428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11861429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1482675 + ... + 1482682.

Almost surely, 2^11861428 is an apocalyptic number.

It is an amenable number.

11861428 is a deficient number, since it is larger than the sum of its proper divisors (8896078).

11861428 is a wasteful number, since it uses less digits than its factorization.

11861428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965361 (or 2965359 counting only the distinct ones).

The product of its digits is 3072, while the sum is 31.

The square root of 11861428 is about 3444.0423923059. The cubic root of 11861428 is about 228.0581825454.

The spelling of 11861428 in words is "eleven million, eight hundred sixty-one thousand, four hundred twenty-eight".