12199780 has 12 divisors (see below), whose sum is σ = 25619580. Its totient is φ = 4879904.

The previous prime is 12199757. The next prime is 12199783. The reversal of 12199780 is 8799121.

12199780 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 2 ways, for example, as 3006756 + 9193024 = 1734^2 + 3032^2 .

It is not an unprimeable number, because it can be changed into a prime (12199783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304975 + ... + 305014.

It is an arithmetic number, because the mean of its divisors is an integer number (2134965).

Almost surely, 2^12199780 is an apocalyptic number.

12199780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12199780 is an abundant number, since it is smaller than the sum of its proper divisors (13419800).

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

12199780 is a wasteful number, since it uses less digits than its factorization.

12199780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609998 (or 609996 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 12199780 is about 3492.8183462642. The cubic root of 12199780 is about 230.2063680256.

The spelling of 12199780 in words is "twelve million, one hundred ninety-nine thousand, seven hundred eighty".