12049978 has 8 divisors (see below), whose sum is σ = 18329760. Its totient is φ = 5940060.

The previous prime is 12049967. The next prime is 12049997. The reversal of 12049978 is 87994021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12049978.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42288 + ... + 42571.

It is an arithmetic number, because the mean of its divisors is an integer number (2291220).

Almost surely, 2^12049978 is an apocalyptic number.

12049978 is a deficient number, since it is larger than the sum of its proper divisors (6279782).

12049978 is an equidigital number, since it uses as much as digits as its factorization.

12049978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84932.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 12049978 is about 3471.3078227089. The cubic root of 12049978 is about 229.2602445527.

The spelling of 12049978 in words is "twelve million, forty-nine thousand, nine hundred seventy-eight".