12027780 has 36 divisors (see below), whose sum is σ = 36484812. Its totient is φ = 3207360.

The previous prime is 12027751. The next prime is 12027803. The reversal of 12027780 is 8772021.

12027780 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2883204 + 9144576 = 1698^2 + 3024^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33231 + ... + 33590.

It is an arithmetic number, because the mean of its divisors is an integer number (1013467).

Almost surely, 2^12027780 is an apocalyptic number.

12027780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12027780 is an abundant number, since it is smaller than the sum of its proper divisors (24457032).

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

12027780 is a wasteful number, since it uses less digits than its factorization.

12027780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66836 (or 66831 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 12027780 is about 3468.1089948270. The cubic root of 12027780 is about 229.1193799220.

The spelling of 12027780 in words is "twelve million, twenty-seven thousand, seven hundred eighty".