11780028 has 36 divisors (see below), whose sum is σ = 32069128. Its totient is φ = 3624480.

The previous prime is 11780011. The next prime is 11780029. The reversal of 11780028 is 82008711.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 11779983 and 11780010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11780029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12118 + ... + 13053.

Almost surely, 2^11780028 is an apocalyptic number.

11780028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11780028 is an abundant number, since it is smaller than the sum of its proper divisors (20289100).

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

11780028 is a wasteful number, since it uses less digits than its factorization.

11780028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25194 (or 25189 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 11780028 is about 3432.2045393595. The cubic root of 11780028 is about 227.5352954134.

Adding to 11780028 its reverse (82008711), we get a palindrome (93788739).

The spelling of 11780028 in words is "eleven million, seven hundred eighty thousand, twenty-eight".