12078820 has 24 divisors (see below), whose sum is σ = 27317304. Its totient is φ = 4459776.

The previous prime is 12078791. The next prime is 12078853. The reversal of 12078820 is 2887021.

12078820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1149184 + 10929636 = 1072^2 + 3306^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22969 + ... + 23488.

It is an arithmetic number, because the mean of its divisors is an integer number (1138221).

Almost surely, 2^12078820 is an apocalyptic number.

12078820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12078820 is an abundant number, since it is smaller than the sum of its proper divisors (15238484).

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

12078820 is a wasteful number, since it uses less digits than its factorization.

12078820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46479 (or 46477 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 12078820 is about 3475.4596818263. The cubic root of 12078820 is about 229.4430126700.

The spelling of 12078820 in words is "twelve million, seventy-eight thousand, eight hundred twenty".