11720828 has 12 divisors (see below), whose sum is σ = 23441712. Its totient is φ = 5023200.

The previous prime is 11720809. The next prime is 11720851. The reversal of 11720828 is 82802711.

11720828 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 11720828.

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 in 3 ways as a sum of consecutive naturals, for example, 209273 + ... + 209328.

It is an arithmetic number, because the mean of its divisors is an integer number (1953476).

Almost surely, 2^11720828 is an apocalyptic number.

It is an amenable number.

11720828 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11720828 is a wasteful number, since it uses less digits than its factorization.

11720828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418612 (or 418610 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 11720828 is about 3423.5694822802. The cubic root of 11720828 is about 227.1534990051.

The spelling of 11720828 in words is "eleven million, seven hundred twenty thousand, eight hundred twenty-eight".