12007780 has 24 divisors (see below), whose sum is σ = 26700408. Its totient is φ = 4520448.

The previous prime is 12007777. The next prime is 12007781. The reversal of 12007780 is 8770021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2509056 + 9498724 = 1584^2 + 3082^2 .

It is not an unprimeable number, because it can be changed into a prime (12007781) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17319 + ... + 17998.

It is an arithmetic number, because the mean of its divisors is an integer number (1112517).

Almost surely, 2^12007780 is an apocalyptic number.

12007780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12007780 is an abundant number, since it is smaller than the sum of its proper divisors (14692628).

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

12007780 is a wasteful number, since it uses less digits than its factorization.

12007780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35343 (or 35341 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 12007780 is about 3465.2243794594. The cubic root of 12007780 is about 228.9923149153.

The spelling of 12007780 in words is "twelve million, seven thousand, seven hundred eighty".