11947828 has 6 divisors (see below), whose sum is σ = 20908706. Its totient is φ = 5973912.

The previous prime is 11947811. The next prime is 11947847. The reversal of 11947828 is 82874911.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8892324 + 3055504 = 2982^2 + 1748^2 .

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 as a sum of consecutive naturals, namely, 1493475 + ... + 1493482.

Almost surely, 2^11947828 is an apocalyptic number.

It is an amenable number.

11947828 is a deficient number, since it is larger than the sum of its proper divisors (8960878).

11947828 is a wasteful number, since it uses less digits than its factorization.

11947828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986961 (or 2986959 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 11947828 is about 3456.5630328406. The cubic root of 11947828 is about 228.6105774461.

The spelling of 11947828 in words is "eleven million, nine hundred forty-seven thousand, eight hundred twenty-eight".